Anyone know anything about Emerald Marketing

I took out a Payday loan, on-line with Emerald Marketing. The amount was 300.00. They would deduct my account bi-weekly the fee of $90. I ended up defaulting with them, then they were just deducting amount at of my account, two 90 pmt at a time. I tried to work out a arrangement with them. Before I defaulted on the account I had paid them 540, so they say. I thought it was more like 690. Now they are telling me I owe them $725. If I paid them 540 and now another $725. That would be a total of $1265. They claim going to notifiy my company and have my wages garnarish, and notify the state. I tried to get them to work with me, she lowered the amount to $525. But I have to pay it upfront.
Any suggestions.. They are not willing to work with me, just threated to go to my company for the garnishment. Please any advise.