I'll fitted interrior & damaged rubber garage door

My fianc? & I bought an interior & a garage door for separate residences. Doors + installation for both was paid in 17 days. We were given a door on display less R200 as 'it was the last of range'. It was badly dented. Installers had bad attitude. Doors were badly fitted. Only one was fixed and has with damaged rubber. We made over 30 calls & drove in 10 times where a job card was issued for repairs. To this day interior door stands skew in frame & closes on its weight. We are very displeased as non existence of service was compounded with passing the buck from one *********** to the next unable & unwilling person. I've asked begged screamed and now seek your urgent intervention. Thanks