Tax Refund SA

I am due a tax refund from a SA submitted in mid - April. Your system says this was should have been paid in mid-May. Online chat gets me no where and the phone lines are shut. How do I establish what is happening and get this paid?

Hi mgillie,

If you click on 'Ask HMRC Online' and request to speak with an adviser, you will be put in the queue for Self Assessment Webchat
Self Assessment: general enquiries

Thank you.