Electrolux / AC 1 Ton — Poor Performance of the product

This 1 Ton AC was purchased 8 months back and this one was from begening not cooling well enough but some how we manged it. but for last one week it reached to its limit and stop cooling the area. we tried to complein no. of times to dealer but he did not able to sort out the problem and told to contact company for service. kindly attend the problem immediately and sort out the issue.