I tried to do a Bitcoin to Litecoin exchange today through Changelly.com, and this is how it went.
Changelly received my Bitcoins within a few minutes but yet their system was saying "Awaiting payment". Which i thought was weird. So I waited for a couple of more confirmations. At this point on the blockchain, my transaction had 4 confirmations, so i proceeded to contact their support team.
Their response was there was a technical issue. I asked them what the issue was and they used the "there is a technical issue with Bitcoin" excuse, which is impossible because the mempool is clear and Bitcoin transactions are working flawlessly. I got freaked out and asked for a refund because i checked the google reviews and there were tons of "Changelly is a scam" posts across the net.
At this point the support team asked for my Bitcoin address, which i gave them. But it has nearly been 24 hours and nothing has been refunded.
They are now ignoring all my support tickets and the more i read online, the more i realize changelly is a scam. I trusted Charlie (Shrem) because he recommended this company to me personally (his cousin is a good friend of mine). It's a shame they are tarnishing so many good peoples names over a few bitcoin here and there.

TLDR : Changelly have scammed me for a considerable amount of Bitcoin and are now ignoring me.

PS. I will update this community as soon as i get an update. If im mistaken, il admit it. But as of now, Changelly.com is 100% a scam.