Impossible to cancel policy

A telemarketer called me today and sold me car insurance, the call centre agent said my premiums would be around R700, but the premium according to the documents sent is double that amount. I need to cancel this policy before you deduct at the end of April as I can't afford this amount and is not what I agreed to.

I tried calling ABSA on various numbers in the documents sent to me and numbers I've found online but the numbers ring endlessly. I'm currently on ***and have been holding for almost 30 minutes. I've been trying to talk to someone since I received this email, so I've been struggling to talk to someone for 6 hours.

Should I go to the branch instead? If I can't get this policy cancelled, I'll have to move my salary and all legit debit order to another account.

I know you're all busy, but please help me, is it normal at ABSA to struggle so much to get help? I regret this so much.