hsbc/beneficial 54.2% profit on 29.5% loan - still not enough!!! carol stream, Illinois

i have had a personal loan (off & on) since about 1975. i re-upped the loan 03-2006 in las vegas,nv. i had emergency brain surgery on 2-10-07. after about 2 months of recovery, i negotiated pay-offs for all 13 creditors i owed. i was told i had insurance (disability) on this account. it was instigated immediately. i was then awarded S.S.D.I. by social security. i asked both beneficial & HSBC (insurer & owner of beneficial) about arrears & was told (both by phone) that ALL would be taken care of. now it's 5 years later, hsbc paid approximately $12,300 on a $7950 loan before the disability insurance reached a cut-off date. this is about 54% on a loan with 29% interest. now they've sold it to a collection agency, who says i owe over $5000. that's because (so they say) of arrears owed!!  they"ve been paid-in-full as far as i'm concerned. this is one more example of big finance business sticking it to the little (& broke) guy!