Can I withdraw my resignation?
The general rule is that once an employee has resigned, it cannot be reversed unless the employer agrees to it. There isn't a legal obligation to accept a cancellation within a certain time-frame. The only situation in which an employee may have a case, is if the resignation is done in the heat of the moment.
What happens when you resign?
you will get your final pay on your normal pay day unless your contract says differently - you do not have the right to ask for it any earlier. as long as you have given notice in line with the terms of your contract, your employer must accept your resignation.