Highly Unsatisfactory Service

I have a telkom cellphone contract which is the amount R450 every month. However in January I wasn't debited so I went to the telkom store and the consultant gave me a print out stating I should pay the amount of R450 however she did not stipulate or inform me that there is a rejection fee of R202. I made a payment via easypay at Pep during the month of January. In February my payment went off as normal. In March they failed to debit me and again another amount of R202 was charged to my bill however I was unaware of it. For the month of April they suspended and blocked my account. I went to the telkom store again and they gave me a bill of R1767 too pay just to bring my account up to date. I requested for the manager 3 times and he took about half an hour just to come out and assist me. I advised him that there is a huge lack of miscommunication between their customers and themselves. They do not call to advise you that your payment didn't go through, they don't inform you that there's access fees to be paid, they don't give you a curtesy call to let you know that you need to come in or have your account updated but when you go to query then they give you a big bill that you need to settle which is highly unsatisfactory. However in my calculations, the amount of R202x2 months =R404 + R450(monthly payment) =R854.00. When I questioned the manager to ask him why must I pay R1767 instead of R854, he didn't have an answer as too how it's billed for so much. This is absolutely disappointing and unsatisfactory as we are loyal customers to these service providers however we are shown the least of importantance when we have issues or queries.