DUPLICATE NOTIFICATION MESSAGES and....

I am receiving notifications from 5miles in duplicate, each message comes twice. I have uninstalled app and reinstalled it but still having same problem. I have already messaged 5miles about this, weeks ago, and am still waiting for a reply. Please tell me how to fix this or contact your IT department and get it done. Also, when I collect coins, the notifications don't seem to be for the amount of coins collected. Messages seem to be several days behind. Thank you.