********, deducting money after I requested cancelation

I took out a cover with them after a representative called me February and we agreed that since I wasn't employed the first debit order would go off on the last day of the month, on the 26th of February they had already deducted, I sent them an email telling them to cancel my policy since they can't stick to a simple instruction. On the 26th of April they debited me again, after I told them I don't need their services and they are avoiding me everywhere. These are ******** and I've got proof of conversations I sent them. They still haven't sent a cancelation letter because they are good at de*****ing people. What's sad is that I can't even dispute your debit order