sagapal, I know it's tough losing businesses but, from what you say, I assume you were operating as sole trader rather than a limited company.
It also sounds as though you are still struggling because the business is under-capitalised and you can't sustain both your current business and the IVA.
I assume that your IVA was based on you continuing in business in your new location but it would help if you could clarify this. Did the IVA allow for your current overheads, stockholding costs etc ?
You are right to be concerned if you are ordering from suppliers knowing that you cannot pay them. Not a good idea and you need to increase your stock-turn to generate fast cashflow and profit. You don't need dead stock that you can't afford to buy. You must talk to your suppliers and come to some arrangement with them.
I am concerned about the threats from your landlord and I would talk to a local solicitor urgently - many advise on landlord/tenant matters with a free one hour consultation - because harassment of tenants is a very serious matter.
I would also try talking to a reputable debt advisor like CCCS. They are a charity recommended by the Insolvency Service and their service is free. Their web site is at
http://www.cccs.co.uk/
Hope some of these thoughts help.