try to cancel Telkom contract

We can not cancel a Telkom contract for the past 5 month. We receive all the time new case numbers and after 2 weeks we receive a "resolve" message. When we go afterwards into the shop they always tell us that they did NOT cancel the contract as Telkom could not reach us. We gave Telkom 2 different contact numbers and both of our email addresses - sorry there is always a way to reach someone if Telkom would just want to reach us. Telkom, current Case number: ********** 2 (as I said, over the last 5 months we have now a couple of numbers)

@Telkom, cancel our contract. We contacted you via E-Mail, went minimum once a month in the shop also made a online cancellation. We try it now for 5 months, we have to pay every month so you have your penalty fee already 5 times. Thats ridiculous.

Maybe someone else has a solution for this ?