Auntie …. Oh no! Don’t know how to put this… yes, I do. I think you might have been had.
In the UK this brand is only available from resellers. And I’ve never seen it before. Price seems expensive. Their “size chart” gives no comparison to chest or bra size. Classic mistake is to order forms too small. They are made using female chest measurements usually based on a 34″ chest.
Best to only buy from ‘supplied by amazon’, so returns are easy.
I am a 40″ chest and I require a D cup (1200gms) to present as a C-cup. In UK about £60 max.
Sorry. Feel for you.