I bought a cell phone ( XXXX ) from XXXX on base at XXXX XXXX GA when i first got stationed there. The phone service was very insufficient so i returned the phone within the 14 day grace period and went to another cell phone company. The XXXX vendors failed to process my return correctly. So after 6 months of me not knowing, i started getting phone calls from a collection agency for the phone i had returned. They put a {$710.00} debt collection on my credit. I went back the next day after i found out after 6 months. They submitted a claim that took another 6 months to follow through. And at which that 6 months i continuously received phone calls and told them of the issue. Which every time they called they said it was no problem and they will fix the issue, which was a lie they also told for 6 months. Finally after a year, the debt was paid by XXXX but the collection debt hurt my credit and has not been removed. It has been paid, but not removed from my credit files. They made the mistake and now my credit score has been penalized for it. Actions need to be taken to not only removed what they have done, but also to prevent this sort of issue from happening to others.