Terrible customer service

The ambassadors signed me up for a 30 days trial Perks app. After opening the app & realising that I couldn't access any of the benefits without making a payment. I searched for the cancellation feature. When l couldn't find it, I decided to delete the app and send an email for policy cancellation. I thought the cancellation was finalised until I woke up a few weeks ago & saw a bounced debit order. I went to Clientele's website - l put my details in the existing clients section and to my surprise l got a call about my number being selected. However, l told the lady that l was expecting a call to finalise the cancellation. She said she couldn't assist & l had to call the call centre again after not being successful the first time. I tried sending WhatsApp messages & emails for assistance. I called again today and the policy wasn't finalised because the first agent couldn't assist, l was on hold for a couple of minutes & when I was transferred to the other agent I had to start the verification process again until l ran out of airtime. All l need is to get this policy cancelled as soon as possible.