This is a bit late, but I've been having the same issues. My LetV box I paid for the on-demand videos until the end of the year (had this over a yea now). And for the past 3-4 weeks it says Data Error "your internet has an issue". Weird I thought since I could still watch the Live TV on the LetV box plus my NowTV, TVB etc.. is all working fine.
So, naturally tried calling the hotline 356-6666 same number they say on the their website, facebook page and LetV Box help screen. But keep getting "sorry number is not available right now, call back later." Must have tried tens of times and same thing. I tried the phoney customer service email address which I have not had a reply back for over a month. I tried contacting LeeCO in the US and they still would not tell me a valid phone number or contact email for HK Office. They ended up giving me two bogus WeChat codes saying they were support people, but neither of them even worked.
I tried sending messages on their facebook page got nothing.
I guess does anyone know what is happening with them?