Rain telecom is overcharging me

I have been using Rain WiFi since December 2023 and have been happy with the service. Unfortunately August 2024 I had to relocate and did not need the service of Rain. I have contacted the call center only to find a representative in India. I did inform him to cancel my account, but to my surprise my bill keeps going higher and today it stands at R10,000. I honestly don't know what to do because they no longer have a call center number and when I send emails, I get a chatbot. This is very frustrating because I really enjoyed using Rain, but I'm not paying R10,000 for services I never used.