old barclays loan year 2000 with ppi and intersted

[Joannewright08]

hi took out a Barclays loan in2000 for 3 years the loan was 5600 and 899.98 added to the start of the loan monthly repayment s was 225.36 for 36 months around 8460. basically round about 1800 is interest for loan and ppi interest but looking at statement they sent they have added interest charged each month on top over the 36 monthly repayments whci then comes to around 9870.00 my loan was only 5600 loan was paid off ppi over 36 months how do I calculated my refund and can I claim this extra interest charged aswell added they wont give me apr but its around 19 per cent id say as its 16 yearsago but half way through the statements from june 2002 until dec 2002 they don't have copys of monthly repayment which strange