Daily headache

4x Brand new tyres was bought at Tiger Wheel and Tyre. Tyres suddenly started deflating but there was no puntures noted anywhere on the tyres. Tiger Wheel and Tyre said the problem is the mags. I paid R350 per mag to re-chrome them. Still tyres started deflating and still doing this. I bought another different make of tyre guess what it doesn't deflate so it is not he mags. I am done with Tiger wheel and tyre.