sue rawlings

I sent a cheque to HMRC in May this year for 1 years gap class 3 voluntary NI payments. I see from my bank the cheque was cashed on the 15th of June. I see there is a track status on my online account which says received on 9th of June 2021. I'm assuming this refers to the cheque I posted as it is the only recent contact I have had with them unless it refers to my self assessment. It also says in progress with estimated completion 30th June. I was going to contact them but I see from this forum the delays are getting longer and longer for the payments to show up on NI records. At what point should I chase this up?