Credit card and collections and bad debts. Help my credit score.

I had a credit score of 595 a couple of months ago, but a credit card company that was reported as a charge-off back in January 2006 just started reporting negatives on my report from then until now (15 months worth) which brought my score way down. I tried to contact them by letter and no response. They turned my account over to a collection agency and still no response from them. This dropped my score to 522. They are saying I owe way more than I do but I can’t get them to validate the debt. Any suggestions on how to get them off my report and/or stop reporting? I have another credit card that is listed as a charge-off, also transferred to a collection agency (the collection agency has not reported yet). I need to get them off there as well. These are the only 2 things that are on there as current negatives.
I also have a few other minor collection accounts that were paid but still on there. I have disputed those as well, but still no luck in getting them taken off.
Also, there is another account in collections but not on my report. I was making payments to the original creditor, but they decided to turn me over to collections anyway. It was turned over in 2005/2006, then recently turned over to another collection agency. The debt is about $1400.
I have 2 car loans (both current), 1 current credit card w/ $200 limit (just received, dropped score), student loans (totaling about $30,000 but still deferred), 1 loan for a timeshare (loan was made through a collection agency and we were not made aware of that when we bought it). Altogether my current debt is around $60,000 and my credit score has dropped to 499. I need to get this up over 600 ASAP so we can buy a house. Please help!
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If they cannot validate the debt with a debt validation letter sent certified delivery, then dispute the file and send in copies of what you sent them to validate.

Write 50 word or less explantion with your disute

You should pay the second card and get it re opened
One year from now they will take the charge off, off

All paid collections never come off it seems.

Try to keep the new collections bay by making payments and asking them not to report.

The 200 dollar limit cannot go over 160 borrowed and you need 1 year on the books. should help in the long run. 1 year

Pay anything to below 80% that you can.
Pay off anything you can

The deferred student loans almost assuridly show 100% owed.

Get that down to 80% and that will help