No contract but DebiCheck received??? Buy now and use anyone else's account!!!

I used to be a client a few years ago, paid my dues and finished my back then agreement. I received an SMS on Tuesday 19th July that a DebiCheck mandate was issued by Isabella Garcia for a monthly debit order from my account!!!! I declined the USSD but received another SMS from my bank that the debit order was imposed tonight at 8pm!!!. This was all after I called them this morning 20th July and was assured that I am not a client? Up to now I have not received "A consumer must receive a quote or breakdown of his/her financial obligations before entering into an agreement with a supplier" probably because I DIDN'T. I have not entered into an agreement AND a mandate was issued on my bank records without consent. I will definitely report this ******** business practice, and will MOST definitely not be a returning client even if you try *****ing.