Can you trust Siemens South Africa?

I purchased a fridge freezer and paid a premium for its online connectivity and cameras that are WIFI compatible only. Siemens Website states that through their app Home Connect, the system can be set up in South Africa. I live in an area that does not have cable; but I do have a good LTE signal and I can watch Netflix etc easily enough. Despite many attempts, I have failed to connect it to the Net. The engineer that Siemens dispatched also failed , and although the Company has software that their IT Department can use remotely to check for issues such as this, despite my request, have failed to do so. I suspect that their products are not compatible with some servers in South Africa, that they know this and that their adverti*****t, that I mention above, is therefore misleading. I think that would be purchasers in South Africa should be made aware of this before they spend money on something that cannot be used!