cashiers mistake

[garrick]

I depositied �1.20 into my bank account however the cashier typed it as �120. Two days later they contacted me telling me of the mistake and asking me to repay the full amount. Now I am in reciept of benefits and cannot do this.I am afraid that they will deduct whatever money goes into my account.Is it possible for them to accept a repayment of a couple of pounds a week to pay this off? It was not my fault and i did not know this money was in my account until I went to get benefit money and assumed two weeks money was in there because of christmas.Do I have to repay this? If so will they accept small payments? I dont want the cashier to get into trouble because of this.Thankyou