WORST SERVICE PROVIDER EVER

On the 7th of June I called Rain wanted to cancel because the network was horrible. The sales agent told me to get a smart router instead because it is the same amount as the old router, and that the connection would be better and faster The sales agent also said that she would arrange a date for the pick up of the old router, she also said that the 3 previous sim cards would not work because I will receive 2 new ones and the other one for the smart router is built in. Fast forward to 25 June, I was almost debited R1 138 instead of R595 because I still have the old router. I have been trying to call and I have been trying to call them but it’s not going through and I have also been requesting a call back but no one has called me. I communicated with the person in charge of their Rain South Africa instagram account and they stated that they’d contact me, but nothing still. I want to cancel my plan and I want them to come collect their routers.