Dealing with the Microsoft 365 Ghosts

Dear Sirs, Have been trying for more than a month, and on a daily basis, to cancel my subscription to Microsoft 365. I keep going in ever decreasing circles and I am still no where near to accomplishing the cancellation. I used to have a subscription on my old Desk Top. I purchased a laptop last year and was told by the suppliers that I had to purchase the Microsoft Office 365 anew. I did, and paid R 2199.00 + R 400.00 installation cost, as a once-off deal. Not a subscription. I realise that I should have cancelled the "old" subscription at the time, but didn't. I now want to cancel the "old" subscription, but the Microsoft web system does not allow it. The deadline for cancellation is April 19, 2021 I have tried to contact a Microsoft subscription entity without success. No contact telephone numbers are available. An "assist" is available, but requires me to Pay R 65.00 upfront followed by R599.00/per month .The "Cancel Anytime" note does not inspire confidence. I have been retired for many years and cannot afford the additional expenditure. I am not shirking my responsibilities, but when Microsoft 365 invites me to cancel a subscription, I would like to take them up on their offer - IF I COULD.

Am hoping for some resolution to my problem. One phone call from a Microsoft "Ghost", should be enough.