mutible billings

my previous complaint refers: I was contacted by Mr. Mopana to send prove of payment but the mail address provided dont work. Now there are other devlopments on this phone no. ***. I paid 499 on the 12th of Jan. inclucive of the fee you charge for late payment, then our acc. was debited on the 23rd and the31st. I just found out today that my sons acc. was debited for 429 n the 26th. We moved his acc. from Capitec to our acc due to problems with Cell C How can you debit an acc that you are not alloowed to this is ***** and I dont want hear any excuses you rectify or face legal action, I am tired of cell c and all the ********