Throat Infection not getting cured.

I have been facing throat infection since last 7-8 years and each time i get it ...i have to take a lot of antibiotics and anti histamines and other medicines. Also docs have told me to stop taking anything cold items ... So i have not been having any cold water, ice cream since 3-4 years. Still i get this infection and also ... Once the medication is nearing end ... I can fell some 5-10 percent infection still there as i can feel my throat still itching. This time starting 22Aug , i took Moxifloxacin and Allegra for 2 weeks. Then i took Augumentin 625 with Levocetrizine for 1week after which i stopped the medication on 12 Sep. Yesterday 20 Sep ... I got Fever and that was due to the throat infection. Now i am taking Linox 600 and Allegra. I dont know what is the future as i have to start taking the third antibiotic as 2 antibiotics couldnt so anything. Please suggest any remedies.