Business ProfileforArbortec Tree Service

I've worked with Arbortec several times in the past for planting. I hired them for a mass planting this season. I paid for $2960 for 6 ft Arborvitae and the owner planted 5 ft Arborvitae. When I asked for a simple validation of what he had purchased vs what I paid for, first he tried to tell me that the Arborvitae appear lower because the walkway is inches higher than the plantings ; but I was comparing the arborvitae to the other 5 ft ones that were planted last year and my fence, which is also down to the rock bed and only 5 ft. Upon asking for validation, the owner got frustrated and decided to cut services and provided me a $800 check as a credit for "perceived" differences. He refuses to provide the invoice from the ********* to validate the Arborvitae he purchased were indeed the ones I paid for -- which any honest business owner would have done unless they were lying and trying to scam their customer. Later he stated that the $800 was for the warranties, which he also voided on my $10+ k worth of plantings I had done with his company.************************ is an extremely unprofessional small business owner who is possibly (not confirmed) defrauding people. He cut me an $800 check for a reason, for the "perceived" differences and refuses to provide the invoice from the Tree Farm to validate that he purchased the tree size I actually paid for. If he chooses to cut business ties with me, that is fine, but I would like to request a copy of the invoice from the Tree Farm for my proposal so I can confirm I received what I actually paid for.