Unauthorized debit orders after cancellation

On the 3 February 2025 I called Rain after no response was received for my cancellation request done on the app. I canceled my rain subscription which was to be effective 1 March 2025. This was confirmed to me both telephically and via email. At the end of February I made final payment and arranged with the courier services to collect the router on 11 March 2025 which was the first available date proivded to me. On both the 8 and 25 March, Rain tried debiting my husbands account with no authorisation. 25 March 2025 I contacted Rain via Whatsapp support and after confirming that I previously received a cancellation email I was then given a reference number. I followed up again later that evening and was told no cancellation request was received and I should rather call. After confirming for the second time of my cancellation email received back in February the tone of the message changed amd said I must call Support and agreed that I should go to the bank to report the unauthorized debits. What gives Rain the right to *****ulently debit an account for a service that has been canceled and the router that has been returned? After being a client for years why must I be inconvenienced by paying returned debit order fees and to call Support after already doing so and going to the bank to report this. Pathetic service and would not recommend this service provider to anyone.