Cannot cancel contract

My data contract ended in March 2020. I have been trying since then to cancel my contract as I have installed fibre in my home and do not need the extra internet. Everytime I phone, I get cut off or passed on to numerous agents. The last time I phoned they informed me that I should keep my data contract as I might need it when I travel and when I refused they all of a sudden said my account has been locked and they cannot help. Someone would have phoned me back one month ago. I am still waiting... I am extremely disappointed in their service and will be moving my cellular contract as soon as someone is available to help. I have been a Vodacom customer for over 10 years. I have never missed a payment and this is how they treat their loyal customers....