Under performing RSQ3

[RogerRSQ3]

Hi guys, I bought a RSQ3 2018 new from Audi S.A.(being South African). What a let down! After collecting the car and finding the gearbox and engine to be at odds with each other, Audi then hinted that S.A. does not get the original operating software for the engine management as our mickey mouse grade of 95 octane fuel does not suffice! With no local help available I'm turning to the UK (right hand drive) for help! I've done some research and found the TTRS and RS3 models to have the same engine/gbox combo. If anyone can confirm whether I can have the software in my ECU replaced by either TTRS or RS3  or even something aftermarket that will work! Any help greatly appreciated!!!