Shocking service from SkyNet

I ordered some bicycle parts from the UK. ChainReaction in the UK shipped the parts to SA via SkyNet. On 7 Jan 2019 I got an email asking to make a customs payment. The email contained no invoice. I have sent a number of requests to Skynet asking for the invoice. 14 days later I still have no invoice. This despite many emails and phone calls. They simply dont care. I have confirmed that they did in fact receive my email requests as the reception lady has acknowledged my emails.