who was the company?
They are obviously using scare tactics so the first thing to do is stay calm
you do not get put in prison for debt in this country ( exept council tax and court fines)
neither can they deport you.
You need to phone CCCS or payplan about your debt problem and if need be they can advise you about your creditors, it may also be worth getting caller id or an answer phone so they can no longer phone up and bully your wife again
CCCS and Payplan give free advise you can get the number by google
hope this helps
someone else will be around shortly