Bad customer service

I was not able to make payments on my mobile account since before the lockdown, as I was unemployed, and I phoned Telkom to notify them of this, and to make an arrangement to pay anything I could afford. They refused as I did not have any outstanding installments at the time. This resulted in me not making an installment, my service being shut down, and my account handed over, which I 100% agree with, as it was my fault for not making payments. My problem is this: I am currently employed again, and I would like to start making payments on my account, but no matter how I try to get a hold of Telkom to make an arrangement, the customer service is TERRIBLE! I have sent e-mails, phoned in to the customer service desk 3 times, even left numerous requests on their website for them to contact me, but I have been waiting for 2 weeks now for them to contact me. I want to clear my debt and improve my credit rating, but until I can get Telkom to make an arrangement with me, my bad credit remains.