Para N is clear, it is for YOU to repair damages to alterations and addition NOT fair wear and tear. You repaired and decorated as good tenantsat you own expense the landlord cannot take money for that because he does not like it. Its NOT in the contract that you must decorate to his taste.
Item 19 of the list is 4 wooden cabinets. Are they distinct as KITCHEN cabinets? It is very ambiguous and courts don't like ambiguity. Even if yes, as long as the doors are not broken and need replacing then "fair wear and tear" is allowed in the contract/ You are not liable.
The contract only mentions your responsibility as regard the items on the list. there is no definitive mention that you are responsible for the FABRIC of the property. IE. You are not required to redecorate or repair before vacating. .Notwithstanding there are any damages over wear and tear, this is covered in paragraph N and you have complied with that.
In regard of the ability for the landlord to withhold your deposit, that is clear in the courts. I have heard masters quote this many times about withholding funds in various cases. They have NO RIGHT. The process is, unless it is clearly outlined in the contract with degrees and amounts that can be easily quantified by the parties and the courts the process is, the landlord must refund in total and then use the courts to get any refund they think is due, unless by mutual consent. There is not in this case. It often does not work that way in landlords minds but that is the law.
In regard of whose name is on the contract then it is no matter about you fathers company. they just need to write a letter that states that they made the transaction on your behalves and you are their chosen representative in this matter.
You should send a recorded delivery letter to the landlord at any address you may have or to the agent to pass immediately to the landlord with a copy to yourselves laying out what you've complied with, what the contract does and does not deal with. What you believe your and there responsibilities are and stating they have 7 days to return the deposit in full otherwise or you will file for its return as a breach of contract and in accordance with the contract, claim interest on the amount and ask for costs from the court.
Some people will try anything on to get money they have probably spent instead of keeping it in escrow and find most people just fold. DO NOT. The court will support you. They hate landlords more than you do and the contract wording is most important. What they THINK it means and has THOUGHt they can do is mistaken. The wording is the most important. There is zero mention of decorative repairs, only alterations and additions which are not the same.
Nothing to do with this but I was tied up with some friends because our boss decided he did not want to pay us. The local HK guys he found, would just accept it. Us gweilo showed him we had a different approach. With LC, SCC and District Court we had a two year degree course in the law and process. When he saw he was always losing and as a weeze, the "boss " decided he would intimidate by claiming that some money I HAD been paid previously needed to be REPAID because another of the directors had given me a personal cheque rather than a company cheque The SCC Master just about ripped their heads off for that stunt. The LC and SCC are more supportive than you think. They have seen it all and more in those places. Have faith and don't be intimidated.