Fog Lights Keep Fusing

<br> My fog lights keeps on blowing after a week and I cant find a reason why. On my 1.4 comfort line Polo 2013 model .I have been battling with my fog lights and I have been taking my car to VW and the only thing they do is to change the Globe and that's it. after changing the globe I can't even drive a week with a fog light. my concern is after getting a new one the other one will fuse it seems like I can't get them both working at the same time. unfortunately my vehicle is out of maintenance plan and the last time I took my car there I was told that the diagnosis will be done on the vehicle and the problem will be picked up. but after few hours I was told nothing was found and I had to pay R568.08 for a new globe that did not even last 1 week. my concern is for how long am I going to change the globes on the car that I bought brand new.I still think this is a factory fault.