incorrect billing of financial products

I received my december statemenmt last year on the 15th, and once I opened my statement and to my surprise there are items on the statement that im being billed for but i do not remember aggreeing to them. I then sent an email to [Email Removed] for assistance in resolving this complaint now more than a month later im still waiting for a resolution. I have been communicating with Nompumelelo Ndlovu and Nhlanhla Makhula since december only after i made a follow up on 6th January they responded saying they received the call recording of which i authorised for the items to be billed. Nhlanhla then advised that they retreived the call of which i supposedly gave my mothers name Mathapelo Molefe(not correct) to be the legal beneficiary and agreed and gave authority on the products. I then advised that my surname is not Molefe and that name is not my mothers name. All i want is to listen to the call and verify what they are saying if that cannot be done or there was an error with billing me i would like to be reimbursed all the amounts that i was being billed for without my consent since the 11th jan im still waiting to listen to that call, if i did agree to them or not.