Alwyn;
1.Since the 200 was (farmed) out to Debt Comp ,your credit rating is probably shot.
2. @ 200 it was not worth bank pursuing you , probably sold it on @ circa e50?
3. As per unsub , if you owe the 200 pay it.
4. Do not take phone calls , keep everything copied and in writing.
Do not give your Date of Birth over the phone . They are hardly ringing to say you have won the lotto! If you do NOT identyfy yourself ,matters go in writing and therefore give you time to properly judge things.
In short pay the 200(if owed) and it will finish at that (there may be some residual huffing and puffing)