Edgars refuses settlement letter to keep adding interest

Its been an uphill battle with Edgars. I requested 4 times for a settlement letter and spent over 2 hours in total calling for assistance. They want their money but would rather send me from pillar to post. I will use this to defend my case stating i wanted to settle but you refused a settlement letter. I'm done calling you and have actually given up. If you want your money email me a damn settlement letter, is that so hard?