Bad experience

The windscreen cracked over night on the Suzuki Swift we hired. No impact, no chips. There are numerous complaints on-line about Swift windscreens that cracks, for no apparent reason. Possibly a design fault in either the vehicle or windscreen? I was promised a call back in 72 hours. 500 hours later and no call. It is the easy way out to take the customers deposit and blame him. Rather do a proper investigation.