Bad Customer Service Regarding Account Closure

I paid off and tried to close my Mobicred account last year. I tried to get confirmation that it was closed multiple times but was unsuccessful. I still get messages from Mobicred occasionally and I've been trying to reach out and confirm that my account was indeed closed, but no one gets back to me. I also can't log into the app anymore to check anything so I assumed it had been closed but now I still get messages from them. I can't understand how it's so difficult to just confirm whether an account has actually been closed or not. I've sent messages on Facebook, WhatsApp, Instagram, sent a message on their website as well as emails. I don't have the time to be on hold for more than 30 minutes every time to speak to someone when you call because either that happens or the line gets cut off before you even have the chance to speak to someone.