There are a growing number of UK retailers (e.g. Thomas Pink, Smythson) who do not offer VAT deductions for deliveries outside the EU claiming that they want to offer identical prices to everyone in the world. They have lost my patronage
If you can return the black suit and get a navy one instead. Black suits would make you appear even paler, not to mention that they are really reserved for funerals.
White / pale blue shirts. Navy / red ties
No personal experience with their trousers but their ties, pocket squares, belts and socks are very nice so I guess their trousers shouldn’t be too bad. They are advertised as having a high rise: