I want my money.

Somebody used my account to debit for their policy, I called momentum and they are giving me a run around for my money. They now want my bank to say it was *****, my bank said the should send the mandate I gave them to debit my account, they say they can't. Momentum I have proofed to you that the account you were debating is mine and I never gave one authority to use it. Please refund my money.