Do you have any proofs? maybe some screenshoot so we can review it? As far as I know Cryptopia is fine because I always trade there and so far I don't have any problem to do transaction there. Are you sure have following the right step by step to do the transaction there?
I have proofs !!
What do you need me to send you so you can believe it ??
Some TX IDs and a screenshot of your deposit screen? Sure I've had the odd delay there too but never for more than a couple of days (only with a VIVO deposit that got stuck).
I think they will have the problems fixed soon, they have been working overtime on their scaling issues since the start of the year.