Vodacom poor service (again)

I’ve been with Vodacom for 18 years now, but the past 3 years the service has just gotten worse and worse.... my account shows and outstanding amount for the last 5 months for a service I cancelled in May 2020. No one can remove the debit on my account for the canceled funeral cover. This morning, while driving (not using my phone) 1.2GB of data gets used and I didn’t even touch my phone. The agent says “apps were most probably updating). Strange how for the past 6 months since I have this phone I’ve used a total of 1.6GB per month. Today in 6min 1.2GB without touching my phone... I just don’t know which network to actually use! Vodacom has become more and more disappointing