I've had a carry on with the bank over the weekend, i paid in £367.50 into the bank on saturday and when i checked my balance later i was £100 short, when i queried this with the bank they told me that i didn't pay this amount in and i only paid £267.50 (which is nonsense) my statement shows that they have taken the £367.50 out of my account and then credited £267.50 back into my account, so really they have theived this £100 from me, do they have the right to do this? If there was a mistake surely they should ring me about it? Can someone help please?

I'm gonna starve now because i have no money to live off!!
If you paid cash over the counter to a cashier then the bank have made a mistake as the money would be counted at the time - they can't come back later and say that you didn't pay that amount.
If you paid the cash in through a machine that counts the money as you pay it in then you would have a receipt for the amount.
If you paid cash into a machine in an envelope then you haven't really got a leg to stand on because you don't have a receipt and the bank can easily say that the amount written on the envelope did not correspond with the cash inside. Your statement will show the £367 going in because that was what was on the envelope, then it will show the adjustment.
The bank haven't taken £100 out of your account - they are saying that it was never in your account.
Was this by cheque? Do you have the receipt of when you paid in it?
Without proof you would have no grounds unfortunately. If it is a cheque then they could dig out the actual cheque to check the amount stated, and look at their computer records for the amount they paid in.

Have you actually asked them what the £100 charge was for?

If they haven't made an honest mistake, you can always contact the financial ombudsman.
As others said if you have your receipt then you have proof, but that still doesn't mean you will get the extra hundred.

Was it a check you put in? Cause if you used a check they can bring up an image to see if it was 267 or 367.

What may have happened is in the numerical part it said 367, but in the written part it said 267. So the bank it was drawn on sent it back for 267 vs. 367.
How are you going to starve ? You have 267.50 in your account.

Your aren't specific as to how and in what form you deposited the money. Until you get that straightened there is much speculation.

Cash, payroll check at the teller window, ATM machine.

Good luck, eat crackers and water for awhile.
Have you check and are very sure that the amount is paid is 367.50 and not 267.50. It is not good to accuse your bank unless you are very sure that they had made the mistake.
Use your receipt, that's why you have this to prove what you actually did do. Then they will take care of it, it's not a big deal, unless you do not keep your receipts!
Your statement shows the mis-recorded your 267.50 deposit as 367.50 and corrected the error when it was discovered. And NO, they would not call you about a mistake.
So back and show them the receipt/statement etc.
We have been through this before. If you have the reciept they are liable.