Defaults on credit rating

Hi, any advice welcome please.

I've got 9 defaults on my credit report from when me and ex split. They are all due to drop off in May next year. However I am now in a position to offer full and final settlements to the creditors.

I did this about a week ago and all have said no. I offered them 50% and said it was from a third party. I am able to pay them off in full, but don't know if is the next step :-( . I am currently on a dmp with payplan

I'm worried if I pay them off in full, will the defaults still drop off my credit report ?

Don't want to do anything to stop them dropping off. Someone said they will go back on my account for another 6 years if I settle them ?

Anyone know the answer please ?