So the tenancy agreement states the property is from 10/09/2015 to 04/09/2015? Obviously this must be incorrect so when did you move in? How frequently do you pay rent? Is there a minimum term specified in your contract (normally 6 or 12 months)? Does your landlord live in the same property? A tenancy is created on the facts (a written contract is not a necessity) so unfortunately just because there is an error in your contract does not mean it is void and can be ignored. If you answer the above questions I can help you determine what the tenancy is.
If the deposit has not been protected in a government scheme then (i) you can not be evicted and (ii) you can sue the landlord for a penalty of between 1x and 3x your deposit amount (in addition to having the deposit returned). I realise you may not care about (i) as you wish to leave but (ii) is potentially a nice windfall for you. You could potentially ask the landlord to agree to let you leave the property (known as a surrender) but in my experience landlords who dont protect deposits arent normally negotiating types. My suggestion is to arrange to leave the property either by giving notice (legal notice - this does not mean you can just say it and move out when you want) and then after you have left pursue landlord for the full amount of the penalty. In order to determine what type of notice you have to give we have to determine what type of tenancy you have - so please answer the questions in the first paragraph.
There is no general right to simply move out of a property when you want because the deposit has not been protected, so please do not do this. Without giving notice, you will still be liable for rent and may find your landlord pursues you for it.
On your tenancy agreement, does it mention just your name or does it mention the names of everyone living in the property? Is your agreement for a room in a house or for the whole house? The reason I ask is that if you have entered in to a joint tenancy (an agreement with all your names on) then you can be made to pay the missing rent that your housemates are refusing to pay. So it is vital we establish whether that is the case or not.
Lastly, why do you have no gas or electric? If it is because it is not being provided then you need to contact the tenancy relations officer (or similar) at the council immediately as it is the LLs duty to provide these. If it is because you havent paid your bills then unfortunately that is an issue you have to sort with your housemates.