Vertus12

Hello I completed a self assessment in late May as per normal for me. Last tax year I made a larger personal pension contribution than normal to take advantage of carried forward allowances. The self assessment calculations show a zero balance to refund when it should be circa £20k to refund to me. I assumed it is showing as zero because it would need manually checked first by HMRC. The return still shows zero now in late August and I have no indication of when it will be processed nor then refunded. Please advise on time lines for processing and/or refund?