Vodacom Poor service

I receive a call in February 2022 from Vodacom agent to take a new contract of of data. They delivered the router only to find that the router was not connecting. I went to Vodacom at Benmore to return the router, they told they cannot take it back because it was delivered to me. They advised me to phone Vodacom. I phoned them to explain about the router and they promised to collect the router to replace it. Since April 2022, i have been phoning Vodacom to collect the router, until today, router has not been collected. My main worry is that money is been deducted from my bank for nothing because i cannot use the router. I am a frustrated customer of Vodacom, I really dont know what to do, I once asked them to cancel and i was told of cancellation fee which i cannot afford. I need Vocadom to collect the router and stop debiting my account for service that i am not using