Very unhappy

I had very bad experience with this sca***rs, i was owing like 25k on my accounts, they gave me a call well i agreed with them then they vanished for the 5 months after that now i owe like 4k they wanna assist and threatening me that i owe then for their services that o don't even know about because they did nothing to assist me even worse they can't get my outstanding balances right, they just guessing that's all they do