If it really won't highlight when you press and hold the text (although this sounds odd), then you could simply photograph or write down the link and then type it into your browser.It's a tablet that I receive all my emails on. Everything else that I have received opens up no problem, the continuous credit link etc. The link to pay for my season ticket won't highlight for me to copy and paste it anywhere else so there is nothing I can do. Why can't the ticket office take the money as normal they have all my details ?
This sounds tedious as it is a long link but in reality should only take 5 mins. Just make sure not to mix up any Zeros/Letter O and type it exactly as it appears in the email.