AVAST CLEANUP (Multi Device) - UPHAPPY WITH SUBSCRIPTION

I am not at all happy with AVAST and should have stayed with Kaspersky.
1st I hate continuous ads trying to get me to upgrade.
2nd I responded to Avast offering a 2 Year subscription of AVAST Cleanup for R18.70 per month payable up front R449.00
I get billed immediately for R936.00. Not what I wanted.
Now I am trying to find a way to cancel this.
I have half a mind to cancel and unsubscribe to AVAST as well.
Not a happy customer.