I have a rebate agreement with a commercial supplier, based on volume. Being in that I have a standard unit price with them and depending on the volume ordered for the month, I get a rebate. We set this in place early last year via a couple meetings and over email. By email it was set in place and agreed upon. The rebates were coming through fine. Now over the last 6 months, I haven't been keeping an eye on it and assumed they were still coming through. Today I asked can they please send me a statement showing all the invoices/payments/rebates. I was then informed that senior management determined that this agreement wasn't valid and it was cancelled late last year. I was never informed of this. Of course I was not happy to hear this. So there is around about $10,000 worth of rebates I had assumed that I had been credited for. Of course I should have been keeping an eye on this but I hadn't been. Being that we made the agreement, the agreement was set in place, I am in the view that I am owed these rebates which should be credited towards outstanding invoices. (I owe them about $30,000 within 30 day credit terms). Even though we never signed anything, should this agreement still be in place under contract law since since it was agreed on I was never informed that it was stopped after it started? Any advice on this would be appreciated.