NO COMMUNICATION - COMPANY DOES NOT BOTHER ABOUT CUSTOMERS AND ONLY WANTS MORE MONEY!

what can I say about this company... when I first took my 2 cell contract all ran smoothly for the first 2 years. my on contract was up for an upgrade so I done it... my phone went slow and kept saying that I was running out of space even tho I has 16gigs free....I DELETED EVERYTHING and still had the same issue. I reset the phone only to get to the login screen to add in my details to get told im not the owners of the phone.....I call the call center to be told I need to pay R350 for them to collect the phone to add in the details....well im sorry am I not paying for this phone ?? why is my details not listed on the phone as the owner! I ;eft it and now am sitting with a 4 month brand new paperweight that i am paying R400 a month for! Last month I app**** for a NEW CONTRACT other than the 2 I have just for a mobile router...no where does it say they are using my 2nd upgrade to provide me the router! my 2nd contract i took is for my son to have a phone. I call today to hear when can I apply for my sons upgrade to be told that the upgrade was used for the router! firstly I chose a new contract not an upgrade option! 2ndly they should of emailed me at least to say that the upgrade was being used to provide me the router! now they want me to pay another R450 for their fault for not telling me that they upgraded the contract for the router !!!! why I requested a new upgrade and if you could not give it to me then decline it or phone a person to say can we use your upgrade !!! I am so livered !!! why should I be paying more money out if you as a company can not do your job right !!!! I am not going to leave it here!!! I want answers AND I WANT MY UPGRADE