Disgusting Service from Cell C!!!

I have had a cell phone contract with Cell C for years now and I am disturbed with the kind of service I have recently received.

My Samsung galaxy A3 2016 had a problem and I sent it into the Cell C store at the Golden Acre Cape Town store and this is what they did, they... *Blacklisted my mobile without my consent after i booked it inn for repairs *Told me that i have to go to the SAPS and ublacklist it *Tag- of- war- between customer service,c-surance and trade party(partner) no one seemed to know who to blame for blacklisting my phone and could not trace its whereabouts *My phone come back without being repaired because "a wrong IME number was filled in the form, *when you switch on the phone it shows a Vodacom logo but they are the one who issued me with the handset after they told me the Samsung galaxy A3 2015 was out of stock" so they issued me with Samsung galaxy A3 2016 which now they cant remember issuing me with now and cant repair it. I don't understand how come they don't have it on system which phones they gave me on contract and when, also, how is my problem that the lady who helped me instore wrote the wrong details on the repair form, I am out f words.

Now I have just been to the store and they tell me that I must call the insurance service myself and ask for the IME number of the phone, why could they not do that in-store for me. I have upgraded to the A& already now and with all this back and forth, I am starting to think eventually I will probably be told that the phone cannot be repaired because the contract for that phone does not exist! what kind of service is this for all my money!!! I need answers CELL C!

What hurts me most right now is that I have recently upgraded to a A7 2017 Samsung Galaxy of which I pay a lot of money for, I regret the upgrade because how can I continue with a Service provider that treats my money like this?!