Totally disappointed

Telekom actually provides the worst after sales service I have ever experienced. This is my second experience regarding my billing, the 1st time I was over charged and nobody ever got back to me even after being told to go to the store. Today, I open up my invoice, after being a loyal customer to you for many ****ing years, my amount had been increased by over R300 for something I never gave consent to. Told once again that I cannot be assisted by calling I have to visit the store.... To ****ing get covid? Telekom is really pathetic