Poor quality and service

Bought a packet of 800 gm nett,peeled and deveined prawns for R 220.00 . Turns out there was only 579 gm of prawns and the rest water. That works out to R 275.00 per litre of water. The owner said i should take the matter with the supplier , namely RIZ seafoods, as he does not have the time. Guess what, no more Epsom or RIZ products for me and those i know. Anyone who concurs, do your thing.