Fedex South Africa

Fedex South Africa the people I delt with is unbelievable ***********, Fedex phoned me on the 22th Aug to let me know my parcel arrived from Germany send via (Fedex Priority) They wanted an invoice, I told the person that there is no invoices as the part send by the seller is a replacement part, I bought part earlier in Aug (also brought in by Fedex) and the one part was wrongly supp****, so the seller send me a replacement part free without any cost on my account. Then she asked me fir a letter explaining this, the seller supp**** me with all paperwork, after that she demanded a warranty agreement, the more I explained to the lady that there is no warranty agreement, this is a online store, with terms and conditions that state if a part is wrong they will replace it, I send her a screen shot of that also. From the 22Aug till today, I had to supply much more paperwork, like a letter in word format to explain the whole situation over and over, today is the 30 Aug, still nothing, I mailed her so many time, phoning is useless, nobody picks up the phone, I got hold of the managers cell nr, left a ton of messages and even whatsapp the manager explaining my problem, he never phoned me or rep**** on my message. I am so frustrated now dont know who else can help me. The joke is the part is only 5 euros worth, I am prepared to pay any fees now just to get my parcel.