phone assistance

ive delt with mtn for years and they good,but what ive been thru this pass few days is just BULL.....the sold me a phone Huawei p8 lite 1027...which they said it has dual sim abilities...which is not the case...for a phone 2 b dual sim..it must have 2 imie numbers which this ph doesn't have...they told me on delivery I should ph them to activate the sim...which I did...and they told me 24 hours then it will b activated...its been 4 days later...and my sim is still rica barred...I phoned mtn again...then they told me..its the couriers fault as they had 2 do it...they took my details again..and gez wot...its still not ricad...I phoned again...they then told me I have to go an rica the sim myself...which I think its bull****!!!!!so no I hve a phone..thts not dual sim....and a sim I cant evens use....I love the ph....but I want it to do what they told me its capable of doing.....I emaild Huawei and they told me...only Vodacom....cell c...p8 lite 2017 is dual sim...and not mtn....coz the 2nd sim slot is blocked by mtn....now y would they sell me the phone under that pretenses,knowing it cant do that....I want a Huawei that can do this...evens if they have 2 give me a other phone...under the same contract...