Promised refund of last deposit now declined

I previously complained about split aces casino when they took 7 deposits totalling £1305 between 29 Sept 19 and 8 October 19 and then declined my request to withdraw my £9850 winnings due to supposed breach of 30% stake rule. As advised by the Gambling Commission and askgamblers I will be taking this issue up with the Curaçao egaming license valuator and the following complaint is regarding a seperate issue.

When I was emailed by Rachel, VIP Manager at Split Aces Casino on 16th October to inform me that my winnings were void, she informed me that my last deposit used to make the winnings ( £500) would be refunded (email attached). On subsequent online chats with agents, I was told three different scenarios 1) I would be refunded all 7 depisits 2) I would be refunded my last deposit and balance from account 3) I would be refunded just €572/£500.
On several occasions after this I asked again for clarification on my refund, but worryingly started to tell me that they couldn't find any information on my refund and on one occasion I was also asked 'the finance department want me to ask you why you think you are owed a refund'. The operators continuously leave the chat when showed screenshots of previous promises of refunds.
I would be grateful if this deposit refund could be looked into. The company cannot promise in writing all deposits will be refunded and then deny the conversations ever took place. I have attached copy of email confirmation of promised refund and several online chat screenshots. More can be provided if needed. Thank you.