Unbelievably poor service from FEDEX

Same issue that many others have experienced, based on the reviews here and the complaints seen on Twitter. Not only is there poor feedback given to customer about the reason for delay in international order (in my case going on for 10 days now in excess of the ETA promised when I paid for the goods) - but most significant: It is impossible to contact anyone in the company. I have held on for 20-30 minutes at a time, with no answer. This was over a few days, and on both of the customer service numbers. The other numbers provided are "Not in Service" or "Does not Exist" when you try them (including the number that is stated for their Meadowdale branch). They do not respond to emails either. I eventually received a mail stating that I had to pay additional customs fees - the invoice itself says clearly: "Please note our banking details have not changed." The mail says" Our banking details have changed", and gives a different account. Nobody replies to my email attempting to clarify this discrepancy. And both telephone numbers that are stated on the email (from the sender, Sipho Malindi) are out of service. Unbelievably poor service. In future I will choose the option for an alternative courier service - even if it is more expensive.