Change the bank account on your existing account to the one you want to use, though this means all future payments go that way.
Do a bank transfer from the account with the money for this in to your regular bank account as recorded with NOWTV, and then buy it on your regular NowTV account.
Open a second NowTV account with the new bank details just for this Sports Pass, though you may have to keep swapping accounts if you have other Passes on the original account. And remember to Cancel the new Sports Pass not long after you get it, so it runs for the full ten months, but doesn’t auto-renew.
There may be other options, but we will need to know the logic of why you want to use a different bank account here.
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