Exorbitant fees and bad communication

I have had the most frustrating experience with trying to communicate with Amarex, Every single telephonic call that I make, the accounts department either drops my call or transfers me to the customer services who drops my call. I have been emailing to follow up on my requests but it seems to not be a matter of importance to respond to emails. I also received an sms to say that they contacted me telephonically (which they did not) and that I should contact them back (which I did but the call was again dropped after being transferred from the accounts department) I placed an order with CultBeauty and the total amount paid for the beauty products was approximately R1062.42 (56.36 pounds incl shipping and handling). I then received an invoice from Amarex to pay R807.85 ex VAT before they deliver my products. This is almost the same amount I paid for the initial products. I have ordered from this specific site previously and never received such an exorbitant amount to pay in fees. I have been trying to contact Aramex for explanation on the fees as I work closely with SARS and the Customs office and the calculations on the invoice is ridiculous. I have been trying to sort this out since the 08 Janaury 2020.