Poor Vodacom

I really donno what to say about this Vodacom Contracting Services. i took a contract with Vodacom via Online Services for two phones in January. As soon as i received the product, i made a cancellation on one phone on January 4th 2020. The customer services said that they will be arranging a pickup of the phone with in 7 working days. The 7 working days turned out to be till March 2020. During this time, i have called Vodacom Customer Services for 4 times continuously and they were saying that the RAM Couriers tried to contact me but they couldn't reach. The Vodacom also mentioned that as my Cancellation was under the Returning Period, they will be refunding my amount on the cancellation product. Instead of refunding, now they are still charging me for the device which was returned. I really donno what to say about this Vodacom Services. Why do they charge customers so quick but the repayments so slow. I really donot want to go with this calling customer care route as they are constantly direct me to different accounts.