Refund

I requsted the services of fedex more than 3/4 months ago they couldnt deliver or must i say they ignored my request after i already paid, i than cancelled and said i wanted a refund because they didnt deliver. Up to date i spoke to 4 people 1 being a so called manager by the name of Melanie Goolam for my refund and up to date no refund. To make matters worse fedex is ignoring me they are not replying to any of my mails. How can a refund take them 3/4 months?? This is an international company we talking about. Pathetic!!!