Forget customer services just get back on to retentions and let them sort it, i'm sure they will.
I had the same prob the bill comes and its a nightmare to understand. The total price is right split between BB on 1 bill Direct debit and the phone bill. But they do it by adding all sorts of weird discounts.
Ah well i look forward to another lengthy call come monday to fix my mothers bill which really is a work of fiction.
So whats the crack with international call plan..used to be included vin TU24 then told its £1.50 then look on the website it says its still included the again says its £2 the click and its a £1.50.. no wonder i'm confused and was told it was it applied to mobiles at the same cost as landlines abroad...great i think 30min call to italy then ireland...

£9 on the bill WTF!