Telkom case no. ***8 - Unknown transaction on my account?

Re: Telkom SA SOC (i.e. Telkom mobile). I have cell phones contract account with Telkom mobile. On 21 June 2020, my account was been debited with an amount of R597.00 that is unknown to me? They even tried to run a debit order on my bank account on the same date with no success. I phoned their Call center on Friday, 3 July 2020 enquiring about this and why my cell phone has been blocked. After a call that took a total of 53 minutes of holding and discussions with them,the problem is still unresolved. She said the charge was for a router. However, I have not entered into any router contract with them. The Call center agent promised to send me information on both my work & personal e-mail on the same date, but she never did. On 4 July 2020 I received a message that reads: "Your account has been suspended due to collection". Today, I paid a total amount of around R1,400.00 so that my cellphones can be unblocked. I cant find an account query or complaints e-mail address on their website either? Who can I talk to have this problem resolved?