Halifax One entrap existing users to pay interest

siannsian

Having utilised free balance transfers and interest free purchase options on various credit cards, we have effectively loaned throusands of pounds over the past few years and not paid a penny interest.
We were naturally pleased to hear from Halifax One credit Card that, as our present card was due to expire, a shiny brand new card was coming our way with the added attraction of 9 months interest free credit on purchases bought with the new card. So, the new card arrived, and we purchased some windows for 650 pounds which we assumed was interest free for nine months.
The new card was mastercard, the old card was visa with a completely different serial number (although both in my name, both halifax One, and no variation in contract to be signed to accept the new card details)
The last thing we purchased on our old dusty card, was some furniture from IKEA for 506 pounds.
Today we received a statement with both transactions listed.(zero balance at beginning of month, followed by 506 IKEA and 605 for windows - total 1111 pounds outstanding balance, with estimated interst payment next month of over 11 pounds)
Ordinarily we would have paid off the full balance (506) before purchasing any other item, but the offer of 9 months free credit was an offer not to be sniffed at.
We have rung Halifax this evening and found out that if we pay 506 of the balance off this month, 50% of this will come off IKEA, 50% off the windows, so the only way we can avoid paying interest next month is by paying off the total amount of credit (650 and 506), which effectively means we have not been offered 0% on our purchase with the new card.
Surely if the two purchases in question were on different accounts the billing should be separate too?
We see this as entrapment of present customers paying interest, who think they are getting a bargain, into continuing paying accruing interest on outstanding balances.
What do you think?
:mad: