Kia Picanto tyre wear front and rear

Had front tyre wear on inside edge at around 5200 miles took car back to main dealers they said must have hit kerb or pothole could not prove that we had not car then went in for 2nd year service around 12000 miles the front tyres had to be replaced because they were bald on the inside tread. Went back to main dealers they told me to have an independent wheel report the front tyres toe and trust was out they adjusted them but found rear wheels were out these cannot be adjusted.
Has anybody else had problems.