Update: A couple of weeks ago I got an email from the bank telling me that the transferee finally granted consent for the reversal of funds. I checked my account and it was indeed reversed.
In the end, the most effective tactic was to continuously hassle the bank via different means (phone calls/emails/letters/in branch) which did the trick. I think the police report was a useful piece of paper to wave around. Although the police didn't do much beyond that, the accumulation of paperwork was definitely useful when speaking to people.
I'd like to thank you guys n gals ITT for the advice provided, it was a happy ending after all.