Cell c deducting attional money from account

My contract was upgraded in july.My monthly subcription was R414PM.This month it was the R414 plus prodata which is correct.Money was debited off my account today(1/09/205).On the 29/08/2015 an amount of R95 was also deducted off my account,I did not authorise this debit order of R95. I called the call centre and waited 10 min with no answer from an agent and the branch in La Lucia durban cannot not assist me. I want this R95 credited into my account within 24 hours and reason why this was debited off my account. I wil stop this debit order if i do not receive any feedback by COB today!.