3G cell booster

I have been an AT&T customer for many years. For the last 5-7 years I have had a microcell which was sent to me by AT&T because of poor service in my area. I recently recieved a letter and an email telling me i would be sent a new cell booster for free from AT&T. I followed the instructions and the link would not work. I also tried calling and talked to different reps that told me the link was not working. I was given another number last week and they told me they were putting my request in and i would receive an email in 48-72 hours. Then the new device would come in about 4 weeks. I never recieved the email and now when I try to use the link it states they are now out of the free boosters.  I am at my wits end. Can anyone give me any other advice