DISGUSTING SERVICE & COMMUNICATION - DOWN WITH VODACOM

I received an email stating that I owed R4000. My invoice shows that i am in credit for R 1900. The statement reflects zero. I tried calling their 081 135 number, and all you get are chatbots. Then I tried *** and spoke to a lady. She put me through to the accounts chatbot again. I did all that was asked and the call was dropped. I tried five more times; the phone just rings. Absolutely poor service and communication. I WILL NEVER RECOMMEND VODACOM TO ANYBODY. THEY ARE THE WORST.