Faulty sensors

I purchased a Haval Jolion in May/June last year at Rola Haval in Stellenbosch and since the day I purchased this vehicle, there has been an issue with the sensors in the wheels. We took it back 3 times already if not more, and each time the same problem occurs. After the last time it was fixed, it shows 3 of the tyres are flat. We brought this to the branches attention and we are still waiting for this to be fixed, no one has contacted us yet. Its frustrating to have to drive there every time, utilize our time and fuel, and still not have this fixed.

I use the N2 often and not having these sensors in working order, is a concern. What if a tyre is indeed flat, how would I know because these sensors are not working? I'm not sure if this was taken up with higher authority yet, but surely if something has to constantly be fixed, there is an underlying issue?

Can someone please contact me to have this properly sorted?

Thanks.