I had a similar replacement with a new exterior door and called a guy from the original company. He removed and installed a new one, but messed up. There was a gap left between the frame and door at the bottom. I called them again but they did ignored and I simply ended wasting money. A week later, my friend bought a guy from a company called Clera windows and explained the things. I was worried about his service since I had a ‘pretty good’ experience earlier and that company was new to me. But I say he helped me get out of the issue. He sat with me for a space planning discussion and explained what he was gonna do. The next day he came with the tools and started work. What he did is, he removed the door off and moved the frame forward. The edge of the door was reshaped and straightened to perfectly fit with the frame.
What I wanna say is, be careful while choosing repair technicians. Not all would get you quality service. Make a detailed research. Better ask around your fellow people and know their experience. Also talk with the technician you choose and know what they are gonna do.