Corporations using this pandemic in their favour to de***** clients

I took up a hospital plan with Clientele in mid March my cover was said to begin after my first premium in April, on the 1st of April I sent an email requesting to cancel, I received a confirmation of the said cancellation on the 20th of April, they proceeded to debit my account again on the 1st of May.....I've tried calling and emailing on countless occasions, finally got ahold of them today and the lady hung up on me. I feel like these major corporations are using the lockdown as an excuse to de***** clients, this behavior is unacceptable and we (the clients) Won't forget how you're hanging up on us during a global pandemic!