Vodacom billing again !

Another problem yet again as a Vodacom customer. Of late, every two months, I seem to have a problem with my Vodacom billing. Either I am told I did not pay my account when the money went off my account, or I have to query incorrect amounts on my Vodacom app. There was an increase in April, which I was told it was a yearly increase. Now again, two month later, my app shows a higher amount then what normally goes off my account. On query I am told it is an increase again , after two months !??? I have never had issues with Vodacom, being a customer for over 20 years, but in the past 3-4 years there are constantly issues.

I have spoken to a Vodacom agent who said she I’ll revert to me today, but how can a company increase rates twice a year, within a two month period ?

I would like to take out another contract for my business, but I am so skeptical right now if Vodacom is the correct company .