I used Rihoas carefully first time last year due to many companies through Facebook are fake. I can honestly say that I have never had a problem and have ordered many thinks since in clothing line. Always delivered and good quality. Some deliveries are quick and I assume in the uk others take longer as they come outside uk usually china, but still delivered in good time.
Cannot comment on customer service as I've never had to use them. But I've bought tops etc about 4 times over a few months and never had a problem.