Sigma 600mm lens bought & paid, no delivery

Hi,<br> I purchased a Sigma 600mm lens from the internet company Instant Gadget. What they don't tell you, is that they source the products from abroad.<br> I paid over the R7000 for the lens and was promised a speedy delivery.<br> <br> A few days later I receive an email from the courier (Optimal Couriers), with a list of equipment, being held by Customs:<br> 1 x Sigma 150-600mm Contemporary Lens for Canon EF<br> 1 x Sigma 150-600mm Sports Lens for Canon EF<br> 1 x Tamron SP 150-600mm Lens for Canon<br> <br> To have this released, I need to pay R4050 to them (Optimal Couriers). I notify them that I only ordered the 1 Sigma 600mm lens. I'm then informed that this is what they received from Customs and I need to pay.<br> I also inform Instant Gadget (Dave Boyle) of this and informed that the UK company made the error, but they will refund.<br> I reluctantly transfer the R4050 to the couriers.<br> I then receive another email demanding a further R7500 for 4 additional items suddenly discovered:<br> 1 x Brand New Canon EOS 5D Mark III Digital Camera <br> 1 x Canon EOS 5D Mark II DSLR Kit <br> 2 x APPLE iPhone 6 32GB<br> Nobody wants to take responsibility, but I'm told I must pay the R7500 and can keep the equipment until refunded.