MTN PAVILLION WONT HELP

On Sunday 28 August 2022 I lost my cellphone. I depend on my phone to do my work as I am a financial advisor. I went to MTN Pavillion and signed on a new contract based on my affordabity and requirements. The cellphone for this contract is a Huawei Nova 8i. The sales consultant did tell me that the phone does not support GOOGLE services but it has its own search engine that works just as well if not better. I do not understand this technology jargon but I did ask if it will suffice for me and my work requirements for which I use certain apps. The consultant assured me it will work. I have been going back and forth to the store everyday since Sunday because the apps that I download do not function properly. When I get to the store a Huawei specialist takes my phone and he downloads the apps using so many different methods something that I will not be able to do. Some of the apps work but some dont and these are critical for my work. I have lost income this past week and my pleas to the all at the MTN store including the Huawei agent has fallen on deaf ears. I requested that they please change the device and I will continue with the contract but they refuse saying the phone works. I am so dissapointed as I am a MTN customer for over 15 years. I am not wanting to cancel the contract i just want to change the device. I am well within the 7 day cooling off period but this does nit matter to them.