as Janne said - its normal if you've loaded the car heavily (unless you have self levelling suspension like air springs). As long as the wheels don't keep rubbing the arches you should be fine!
A car's tyres should NEVER touch the body work even at maximum load and under compression. If a tyre was to foul the body then it could quickly wear and fail catastrophically. Be aware that the maximum load of most cars is only something like 500 kg (I think 540 kg for you car depending on specification) and that includes passengers, roof rack, and luggage. You may have over loaded it!