The Deed of Guarantee is not between you and Credi Protect.
Then creditor that you have guaranteed to pay is Cobble Patch Loganlea Pty Ltd
Credi Protect is the company they purcahwed the guarantee document from. It does not mean, because Credi Protect, is in liquidation that the agreement is invalid. The agreement is between you and Cobble Patch.
If Cobble Patch was in liquidation then the liquidator would chase you for the money.
You agree to keep the creditor (Cobble Patch) indemnified against any losses as guarantor.
Apart form the Credi Protect Logo, which is there for advertising purposes, they are not part of the deed.
The terms and conditions are also from Cobble Patch
The documents are valid and enforceable. They can still be used after the company that created them ceases.
I am sorry I cannot give you anything more positive.
Who do you think you entered the agreement with and to whom did you guarantee payment?