You are also entitled to receive a regular pay slip, otherwise how would you know that your National Insurance contributions have been paid on your behalf and that the company is not swindling you and HM Customs and Revenue.
Write to your employer and state that your are owed two weeks money and that regardless of the reason for which you were dismissed, you will take legal action to recover your wages if they are not paid by a certain date. Also ask for some wages slip as evidence that your National Insurance contributions and the appropriate tax has been deduced.