After going through the conversation I see that all you did was misinform him about most things about your service. Due to that you are requested to refund him the full amount and NEVER EVER promise things to your customers again that you cannot fulfill. You have 24 hours to refund OP
I'm sorry but we have informed all our clients that we dont give refunds and he also used the server slot for a month. Thats written in our discord server.
TOS mean nothing here. You have the time I mentioned to refund