BMO Harris Credit Card Complaint

BMO Harris Credit card department,

Closing/Cancelling account New York

I have been a member of Diner Club for - years. During that time I accumulated - points. I cancelled the card on - - 2015. I tried to reclaim my points and was told by Diners that I had lost the points after - days. My claim to the points was made - days after closing. My claim is that this is fraudulent practice by Diners Club. Those points were earned based on card usage and have a redemption value of $2600.00, Diners have no right to cancel those points which were earned by me. I have written to Diners Executive Complaints and have had no response. Diners did not inform me in writing that I would loose my own points.