*****ULENT ACCOUNT FROM CELL C!!

I am so disgusted and angry with Cell C. It been three (3) months now. They have been trying debit huge amounts of money from my bank account. Yet I don't have an account, NEVER tried to open and will most definitely NOT open an account with them. What puzzles me is I have never received a call requesting me to open an account with them. And I'm curious to know where they got my personal details from, and they don't try calling their customer from the number their cell C number. Every month the debit order amount has been increasing immensely. And these debit order happen anytime of the month. As we speak a debit went through tonight and the money took was a very serious payment that had to be forwarded immediately. Kindly assist me with this matter URGENTLY. It sort of ***** it damaging my financial history.