Still waiting on my Maryland state tax refund — anyone been through this?

Hi guys, filed my Maryland state tax return back in Feb and still haven't received my refund. It's been almost 3 months with no update.

I've already emailed the Comptroller's taxpayer service and checked the refund status tool online — both show nothing new.

Has anyone dealt with a long delay like this? Did calling them actually move things along? Any advice would be really appreciated!