Handing over of the account

I have made numerous payments towards my Edgars account, suprisingly same was handed over to the attorneys called MDB collectors which is now harrassing me of payments.I am making regular payments towards my account and fail to understand as to why this account was handed over to the attorneys in the first place, i am receiving threatning calls from MBD agents who are very rude to me.Please helpy me because now my balance has increased drastically and instead of this debt going down it is increasing. MBD has also mentioned that i have two accounts which in my knowledge i only hold one account with Edgars which is ***.<br>