Sold outdated 2015 Tablet that Samsung headoffice said: "Should not be allowed!"

I am directly addressing this to the managers at MTN and I will be posting to MTN head office as well, ZAIN DAVIDS; You are a pathetic ***ardly, *********** human being and should be FIRED from MTN as you were hopefully fired from Samsung (as you stated, "you previously worked for")! 10 weeks, TEN WEEKS we had to wait for you to fix up YOUR f-up, you sneaky "know-it-all" P.O.S! This was suppose to be the last time we walk into the N1 City MTN store to finally resolve this tablet issue. You sold us an outdated Tab E 2015 model and told us that it has the latest Android Oreo and **** about the specs, and then after opening and testing the tablet we realized that it was maxed out to Android 4 and can't be further updated. He said it can be updated to latest Android at Samsung, so we went to Samsung head office and they said it's not possible. Their words were: "The device is so outdated that MTN should not be selling this device to the public at all". My sister was 9 months pregnant when she took out the contract and her baby was 2 weeks old when we returned it. They insisted on her staying there in the shop and waited hours to be helped. It took 40 minutes to track the parcel that was sent to Johannesburg, 8 weeks ago. (He told her exactly what she wanted to hear in order for her to take out the contract right then and there, she was conned.) We requested and filled in a ton of paperwork for it to be sent back and give us what we paid for. I looked you dead in the eye and told you, you wrote a FALSE statement on the paperwork you submitted and you told me that we wrote that B.S., "Tablet freezing", "won't update", BULL!, I had that tablet in my hand and told you this is not what she wanted and you would have sent it back and replaced it with the TAB A 2019 I requested and then today, 10 WEEKS LATER you give me the same TAB E 2015 again!? You *****! I hope to God that someone drags you out of that back office you keep hiding in and kick you to the curb, then you can tell everyone how you "use to work for MTN". We demanded a call-back from the manager as she was apparently not there and "getting her teeth and eyes checked" as per the consultants words (not mine) and we will no longer be needing a replacement, instead a full refund as agreed upon for the almost 3 months we had to pay for a contract and device we do not even possess. Fix your mistake, you **** to your customer, got caught in a lie, and its taken TEN WEEKS to rectify thus far, still not resolved as of yet. Full cancellation of the new contract requested.