Online System DOESN'T work

I placed two orders via the Makro Online System. You are supposed to be able to download your invoice from the site once it is uploaded by Makro. Although the site shows that the invoices are available you cannot open them. The system gives you an error message saying 'Bad Gateway - Host'. I then called the call centre to ask for a copy of the invoices as it is my financial year end. I have been promised that someone will get in contact with me in order to email the invoices. A month later and no-one has called. Today I sent our company driver to the Woodmead branch to ask for their assistance in getting a copy. They sent our driver back saying that they cannot find my orders (even though I sent him with the printed copies). Our receptionist tried calling Makro again today to ask for assistance and was also told that she must email them and they will see what they can do. I think this kind of service is pathetic. Either send the goods with a tax invoice or make sure your online system works. Your customer service department is shocking, They are very unhelpful and just the way they communicate over the phone makes them sound lazy.