Employers write to companies for references, they don't phone up guys, he could be anyone.
I think that your grammar lost you the job, not the reference.
Irrelevant. What's done is done. Try to learn from your stupid mistake and do NOT use people who have declined to be a reference for you as a reference.
No I think St Gobain put your application in the shredder when they saw your application lacked elementary punctuation and your spelling is a joke.
The only relevant references are those of prior employers.
Lots of IT people making 6 figures work in cubes, and wear jeans to work. They also could probably finish their questions instead of forgetting the end of it, the part that said what they were asking..
So you used someone as a reference that told you NOT to use them?