Unprofessional service from vodacom

I have been a customer with Vodacom for many years, I have been having endless issues with them in the last 12 months. I have a data contract With them which I wanted to cancel since I took a wifi contract, I was told that the data contract was on a month to month basis only to find out when I went to the store that the contract could not be canceled and it was not a month to month contract. I was not impressed with the unprofessional service. I also purchased a xiomi TV smart box recently and I have been having problems with the device since the 1st month I have it. I reported it to the store a few weeks ago, I even spoke to the manager who promised that the sales consultant would contact me asap. Each time I have to use my personal air time to contact them, I have received no assistance in this regard since I reported the problem. I am not impressed with the unprofessional service received. I would like Vodacom and xiomi to assist me in this matter as quickly as possible. N. Husain