Can debt relief services affect your credit if you use them to lower your interest rate?

I am planning to sign up for Care One debt relief services to help me consolidate my CC debt. Do you think this will actually work? will this affect my credit rating? Does anyone have an opinion about this company and their services. I was reading their blog and for the most part it sounds like it really works but I’m trying to search for more answers.
Thank you in advance for any suggestions or feedback.

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