Debit without my authorisation

Hi Peter I have problem with pioneer on January I have ask pioneer to help me with debts they failed to help I have sent them email letting them know I will continue paying my debts as usually so I dnt need their assistance we both agreed to each other so now boom a debit order of 1200 in my account while I have pay all my debits for this month , so I dnt know what is this debit order for because they didn't even pay an provider's , all providers debited in to my acc as usually so now pioneer chew my money in my bank account were as we have canceled the deal I have with them .please help I need my money back fro pioneer I don't need their help any more because they fail to help me and I fine I don't need their help because they promise lies only