Vodacom cancelation nightmare..

I have been trying to cancel 2 cell contracts. I have dialed ***, ***, 082 135, ***. When I type in the cell number it says number invalid. I eventually managed to actually speak to someone who was so rude. I explain my story that I need to cancel two numbers I asked him should I give him both numbers I got an abrupt "no" then he told me to phone the cancelations number when I said no please that's where I was having the problem, he said he would put me through I waited about 30 minutes on the line and when I eventually went through I got the same message enter your number you querying and when I enter the number it states its invalid. I am a pensioner and cannot afford these contracts and now that they are up for renewal I have been trying to cancel them but have had no joy. I have not had transport to go into town to cancel it at a shop. I am also scared with covid.