My sister has got herself in a huge pickle again. To cut a long story short 3 years ago she did a dodgy cash your pension in thing and came out with 14k. Some how the tax man has no found out and says she owes £8k in tax pending investigation so it may go up. That amounts to £700 per month as they want it paid by March. She can't afford that but they won't budge. She has looked to taking out a loan but as she has crap credit can only get a guarantor loan and she's asked me to be the guarantor which due to a long history of bailing her out numerous times I don't want to do. Is there anyway she can negotiate the repayment amount x