Ridiculous custom charges

I recently made a purchase on AliExpress for R220.00 and this was the designated logistics company used to my shock I recieved a message requesting me to pay R260 for taxes and customs, I asked to explain and breaks this down to me as to how this is possible for tax to be more than actual purchase and they have not responded back ever since I told them I won't pay that amount and now refuse to return the package to seller so that I can be refunded