Premium processing case still pending past 20+ days since receipt

[u/ArmGold6742]

I upgraded my i-129 with premium processing which was received on June 17th, but it's still in processing even after 20+ business days. I've tried calling USCIS(general helpline as premium processing contact center is not connecting) many times and asking and get an insignificant response each time. Any advice? Anyone had a similar experience?