Very poor service level by Mobile Talk

In this time of pandemic people are adviced to opt for online shopping. I also tried to buy a contract cellphone online and this was not the first time I buy online, and I had realised that there are more better deals online than in stores. However this time was very unfortunate to deal with Mobile Talk company. I had a very bad experience: On the 19th July 2021, I received a delivery of a cellphone. unfortunately the device was faulty. I reported/logged a query on the 20th July (less than 24hrs after receipt) and was promised that they will collect the device and replace it within 5 working days. The collection never happen until 19th August after my several calls. A week after they collected the device I cancelled the contract as they failed to replace the device within the time frame I had given them. It is now September the 28th, Mobile Talk has not yet cancelled the contract, they say they are still waitng for the device to be collected from me! and Telkom is still billing me for a service I am not using. This is extremely Zero and costly service I got from Mobile Talk. Mobile Talk - they do not do follow ups, I as a customer has to keep phoning them, which is costly. I rate this company service level Zero. It is very disappointing to have companies who offer this kind of poor service level when we were hoping online services to be the best option in this time of pandemic.