Unfairly treated.double debit and ******

I am a long standing client with warranty solutions spoke to farhanab who confirmed my premium .they further went on to confirm via email. Due to me signing up they have my banking details.out of nowhere my account has been double debited not sure why as no call received that premium will move from R441.00 to almost R1300 .Total of R823 has been taken without my knowledge. It is so sad because not even once have I not paid them even when they unfairly pay the service R6500.00 But I as a client feel I have been ****** and ****med by the company I thought is assisting I am awaiting your earliest response as I do need my money back