Carrabba's Italian Grill review: email offer for lunch

I received an unsolicited email approximately on october 14th offering a free lunch with purchase of one lunch. I invited a friend for lunch on oct. 16th and went to my local carrabbus on us 19 in port richey at noon. Upon arrival the door was locked and the times listed on front door stated not open until 3pm. We decided to run some errands and come back. Returning approx 2:15 pm I called the restaurant to confirm they would accept my emailed offer. I was told they would not, as they do not serve lunch and had no lunch menu. I asked if we could use this offer on the dinner menu at 3pm and was told no. I do not understand how they could have no lunch menu when they advertise lunch on weekend days. I was offered no solution by the woman on the phone other then to go to another carrabbus restaurant. None which are nearby. Not only was this frustrating for me, but embarrassing as well, as I had to offer my friend lunch at another local restaurant and paid more than I had anticipated. I am retired and on a fixed income. I feel they should have honored the offer and let us order off the lunch menu used on the weekends.