No customer service

I have been trying to cancel my contract with Rain but I have not been assisted.. I went to the App to log a cancellation but the option is not there and I also tried speaking to the bot but it also sends me to cancellation platform that doesn’t exist. A consultant called me and told me that I now owe Rain and they will not cancel my contract without me paying the amount, I then went to ask how can I be billed for a service I am not using as the company switch off the data usage long ago. I am customer which means I must pay for a service offered but the data was switched off for months and we did not utilise it therefore what exactly am I paying for.. Can I have my services cancelled and send a driver to pick the router cause I am not using the data and do not need it anymore.