My employer haven't paid me & are threatening to take over half my wage if they

[Ellie95]

I worked for a call center for 2 weeks,my contract got terminated due to me 'not hitting targets' which is near impossible in just two weeks i was getting customers no problem they were just slow sending paperwork back.Which is the grounds i was dismissed on without even being given chance to contact the customers known as 'chase' to see if there was any issues with paperwork.The working environment was ridiculous music was played at full blast so i had to cover my microphone on my headset because customers were asking if i was 'having a party' it was impossible to concentrate.Also the owner of the company was selling cocaine to the staff who were casually doing it at there desks,i have videos of the hectic work environment (owner dancing on desk ect) Anyway i was supposed to be paid on the 02/05/16 i contacted my old manager who informed me it won't be till Thursday due to the accountant not being in.It got to Thursday and i still wasn't paid and he informed me he 'lost' my bank details so i gave them again now it's the 13/05/16 and I've still not been paid because apparently the accountant is on holiday again. They've also said i'm losing £350 of the £600 i'm owned due to breach in contract,which pretty much stated if i'm dismissed for not using training i lose it for training fees,the problem is i was never provided with training i was given a script and sat at a computer someone please help me i have a home and children to pay for ?!!!