Deaf Ears

My international parcel *** cleared customs on 3rd November and until today I have not received a correct invoice from Fedex to pay them so I can receive the goods. Emails to Zaron, Christiel, Rishael, Petunia, Nabilah, Sakhumuzi, Zarod, and Esmeralda just don't even get the courtesy of a reply. They sent one invoice with an incorrect tariff code for fresh raspberries which would have required me to pay 20% duties instead of 0% duties. All I did was ask them to change the tariff code to the correct one for computers because although my goods are called 'Raspberry PI's, they are in fact computers and you cannot eat them. It has now taken 2 weeks to get this simple mistake fixed and send me a corrected invoice. I don't know what else to do? Please help.