accidentally P2P

With urgency. I accidentally clicked a P2P sell option instead of a bank transfer. I am totally panicked I sold for 1000 euros less and on top of that it says it is a UK bank transfer while I am in the Netherlands. Now the buyer has transferred money and I do not see this also in my bank account and I want to cancel the order is there a possibility? I try to reach the service desk but they do not respond. I have not yet released the tokens.

Please someone i'm getting a heart attack....