The customer service on whatsapp is probably very busy because they don't pick calls and are late to answer messages, if at all.
This site sells cheaply priced foreign-made bras and that's good, but buyers should be aware that bra may be wrongly labeled and you may get smaller cup and strap sized bras instead of the ones you think you ordered, simply because the bras are wrongly labeled. Since the items are usually 'on sale' the chances of you returning and exchanging are most probably zero.