DMS Contracting

We hired Mr. Darrien Scott (owner) to get the permit for Moving furnace, re-​piping gas and replacing HVAC. He was also responsible to over see the job done meets the requirements. He wanted us to pay him 75% of the charge upfront and then increased the price after getting the permit.
He visited the job site once in my presence and mentioned that all the work done was good and up to code. He also provided a gas gage to be fixed for testing the gas connection.
We had a lot of problem with this team and I have been trying to get a hold of Mr. Darrien and he does not receive my call nor does he reply to my text.
They are already 3 weeks behind schedule and Mr. Darrien tells me to be calm and he will take care of the situation.
Mr. Darrien initially insisted that we do not need permit for any of the plumbing work, but after me insisting that I need a permit he pulled a permit and mentioned that it was all I needed and I am covered.
After waiting enough I called his Master Plumber Mr. Corry Norris from Norris Plumbing Services to visit the property and shared my complaint to him. He was surprised to see the quality of work and also the wrong permit pulled for the job.
Mr. Norris will be having a word with him and will try to get this resolved. I will update my review if Mr. Darrien stands up to his words and gets the job done.
Update: I had to pay to Mr. Norris to get the right permit and for his time. I hope this review helps before hiring this contractor for any task.