How to clear up chlamydia ? My good friend Halima has got this , I want to help her.?

Halima is 26 years old girl and she has a very good boyfriend , they have been together for 2 years , ans they have intimate relationship for two years , too. In recent days , she often complained that she has got chlamydia and she can not be cured radically , as this disease often recur on her , who can help my friend?