demanding extra payment

May 2019 I took out a router contract with Telkom everything was going ok till end of May 2020. I was unaware that they debit didn't go through but still i received my monthly data they didn't suspend my line, and no one called or communicated with me regarding paying double end of the month or making me aware about them not receiving payment. So as soon as I was aware I made sure there is enough money in my account. Come end of June they decided to debit only once even though there was enough money in my account and suspended my line on the 3rd of June 3 days later. When I call to ask why they didn't debit twice and decided to suspend my line they are telling me about a connection fee of R200 and something rand that I must pay end of July, yet no one called to inform me about the out come of me not paying but the debit order bounced once and not twice and on the 4th I paid that money I owe them and on Monday the router was reconnected so why the R200 and something rand. if it means cancelling the contract and stop paying so be it but I'm not paying That money I'll continue to pay my monthly payment and nothing more. No one contacted me I had to call them and I only happened once. ref no: ***