replacement of windshield

i purchased a replacement windshield for my 69 Mustang and requested removal of the black glass in order that I have a new headliner replaced. I paid approximately $325 for the order. The following day, Payless reported to the interior shop (2 blocks away as agreed) and removed the back glass and windshield. Approximately 3 days later, the headliner was replaced and I requested that they reinstall the back window and install the new windshield. I received conflicting dates as to when the job would be done, all the while the car was kept at the interior shop and utilizing a bay. On 8/4, I went back to the Payless and spoke to the manager who said that he was backed up and couldn't complete job until Thursday or Friday. On Saturday, the job still wasn't done and I had to have the car towed away from the interior shop at my expense. I insisted that Payless return my monies in full however they demanded to be paid for removing the back glass. I asked for the return of my original windshield however was told that it was thrown away. I would not recommend this business to anyone and plan legal action against them. I planned to have the car complete to deliver to my dad during a vacation later that month, they completely ruined the plan. Terrible business and attitude from the management.