I requested a cancellation from Rain in March

I requested a cancellation from Rain in March. On their website, it was stated that the cancellation would be effective on 25 March 2025. I later received a call from one of their agents who finalised the cancellation and stated during the recorded telephonic conversation that the cancellation was confirmed; that no further billing would take place and services would be discontinued on 25 March. I was also told that I will be called for the collection of the router. Not only was a billed for another month (meaning that I’ve paid for internet services twice since I’ve begun an agreement with another service provider) but they are refusing to collect their router. I have logged multiple requests to be contacted via their online platform since that’s the medium they use to communicate with clients and no one is getting back to me.