Tim Hortons review: wrong order - insistence of employee

I went to Tim Horton's this morning to order my usual morning coffee. I always order 1 cream, 2 sugar. I noticed when she handed me the coffee it said on the top of the cup, 2 cream, 1 sugar. I corrected this and she return to the coffee to me saying that it was a write up error. I noticed after I drove away that they simply switched lids leaving me with a 2 cream, 1 sugar coffee which I cannot drink. Thanks for ignoring my request and trying to deceive me by switching lids! Wow. This is the second time this has happened. Why they can't get it right, I'll never know. I believe as a regular customer I deserve some vouchers for coffees. If not I won't be going here anymore. Thanks.