@SHFraser There is obviously more than one issue here, so it might be easier to try and focus on the Digital Voice issue as that feels like it might be the easier of the two given you aren't receiving the call at all.
The first step I'd be taking is to identify the originating number for the bank's call. You can likely find that out from your husband's mobile, or your landline phone's call history if it is still present from when it was last working. Is it anything unusual such as an international number? Is it number witheld etc?
Couple of other things you can do on Digital Voice itself.
Check 1572 which is junk voicemail to see if there is anything in there. My settings for call protect (which I assume are EE default because I haven't changed them) is "Numbers we’ve identified as unwanted calls" and "Unknown numbers" are ticked to go to this junk voicemail. "Witheld numbers" and "international calls" are unticked in my case.
You change these by going into your account and into the Call Protect settings. Whilst you are in there, you can look at your received calls and it might be interesting to see if the bank source number appears in that list. You can also manually ADD a number to a favourite list in there "These are the numbers you always want to hear from" which I assume bypasses Call Protect if that is what might be blocking the call.
If you don't get any further, then at least you have the option of putting a call into EE armed with the bank source number and ask them why it isn't being received.
Finally, does your handset you are using on Digital Voice have it's own call blocking capability? If so it might be worth checking you haven't inadvertently blocked the bank number.
