The phone number for Marbles customer services is
0870 6061177
But if you search for that number on this site, it'll give you the number:
0121 2145549
I just got "told off" as it turns out that number is for Lost & Stolen cards
- he was forgiving and said he'd take the call this time but please don't do it again. (he probably assumed I'd used the 0800 number)
If you search for just "marbles" as a company, you'll get this number which might be the correct one:
0121 2145552
Just a heads up. Don't want anyone getting banned like with A&L