Cancellation contract from telkom

Hellopeter I have a contract with telkom since last year on the 3rd September 2019 i took a wi-fi from them so we agree with them that they will take their money on the last day of the month so they never take the money after 2 to 3 months am using the wi-fi they suspend it and i went to the store to find out what is going on, they said to me the was no money on my account and i told them i left the money but they never take it, so i ask them what must i do now can i pay the cash they said yes i can pay at pick'n pay but i must make sure i pay the money before the due date i did so, in May 2020 they suspend my router again when i call them they said they didn't get the money on my account and i told that i made a payment at pick'n pay as they said to me so they its for the charge since they didn't get the money so i didn't pay that money they opened my router. Now blocked my router sim card and i made a payment of R169.00 yesterday so today i call them they said i owe them R540.00 when i ask for what they dont tell and i told that lady that i have the statement shows that i must pay R169.00 and she said oh okay then. Now i ask them them to tell me how much is left for me to finish that contract with them coz i want to pay all the money i owe them and leave them alone she said i must pay R1500 for cancellation and the amount i owe them which is R1800 so i must pay R3300 now. Please Hellopeter help me with telkom am sick and tired of tbem.