Dedikate

Hi Everyone I have a 550 score currently I just opened a Capital One unsecured with 300 limit Ive had a secured card for 200 with first progress open for a year I have 7 derogatories (3 of them are chase credit cards totaling 20k), None of them have been paid and they are all about 5 years old What else can I do to boost my credit score? Thank you in advance!!!