Terrible , worst , awful service!!!

I loaded R300 on Saturday and on Monday l was already on negative balance. My account wasn’t credited and yesterday they switched off my meter. Terrible service!!!!! Awful! Haven’t been able to talk to their call center agents as l have been placed on hold for more than 40 minutes. Been trying their call center for 2 days now !!!! Emails are responded to by automated messages. The person operating their whatsapp number isn’t responding either. I am at my wits end! It’s frustrating.