Wrongly monthly deduction from my account.

I have a problem, I pachased Huawei ruter for R169 per month. It was on special.And Samsung A2 core for R100.They told me to pay R99.00 connection fee. I was suppose to pay R269 per month. On the 25 th July 2019 R447. 14 was debited from my account. On the 26 August 2019 R312.30 was debited from my account.I think something is not right need answers from this people: Telkom mondo. Or I must cancel the contract with you because you are not loyal to me.I need answers.