Hi Mishel,
You've become another victim of the bank's Right of Offset, whereby Barclays PLC can take money direct from your bank a/c and use it to make up the missed BC payments.
You can assume that Calders will forget about accepting any F&F settlement now the a/c is back up to date. However, the process will start over again if you miss any more BC pay'ts.
The only way to avoid this is to open a bank a/c elsewhere so BC cannot offset like this again.
Have you reclaimed any penalty charges on the BC account over the last
6 years
.
Also, have you suffered any default charges on the bank a/c.