Tim Hortons review: unhygienic environment

hi there
the food of tim hortons is good
but it doesn't seem good when you see houseflies on the food everywhere.
I have seen flies on the sweet portion (where timbits and croissants are kept ) and even asked the employees to do something about it
Flies can lay upto thousands of eggs and if such food is eaten with eggs of flies, one could get sick due to food poisoning or may even lead fatal.
Please see into this matter.
Thank you.