Kelly P review about company Kelly Roofing

I had my roof replaced last year April 11th 2017. On April 18th 2017 I had asked for a FINAL bill, after speaking to the accounting/ finance department they sent over the final bill, which I gladly agreed upon the amount and paid. Now YESTERDAY mind you it's July 5th 2018!! I received an email stating that I now owed a bill for $1, 267? Really??? for what I wondered ?? So I inquired with a phone call, the collection department stated that THEY " Kelly's Roofing" was audited by an outside Accounting firm They found some invoices that were not processed? REALLY they are now trying to collect $$$$ when clearly the error was within their Employees or Supervisors not managing the invoices properly. Well they will NOT get one single penny from me. If they came to me last April or even in May of 2017 and stated they screwed up on billing I would understand but 15 months later.. I think not! A VERY UNHAPPY CUSTOMER