How to payoff AT&T Bill that was sent to ERC collections?

I would like to know how can I get a collection of $1,500 paid off and cleared from my credit report. It was from a bill I had from AT&T that I failed to pay on time and ended up getting sent to a collections company called ERC - Enhanced Recovery Company. I checked my credit report through Credit Karma and it... show more I would like to know how can I get a collection of $1,500 paid off and cleared from my credit report. It was from a bill I had from AT&T that I failed to pay on time and ended up getting sent to a collections company called ERC - Enhanced Recovery Company. I checked my credit report through Credit Karma and it shows the collections debt by ERC and it’s really affecting my credit report. How do I pay itt off so it doesn’t show my credit report? Should I just contact ERC and pay them? Or if possible can AT&T get the collection back and I pay it back to them? I’m really confused and need some guidance?
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