Terrible experience

My dad hired a tax guy for 2019 and I still have yet to get my refund and stimulus. He kept saying that since we are in a pandemic the IRS was taking awhile to send me my return. However, I would get notices in the mail that he did not fill something out right and would email him the forms to redo. He redid them and I still had concern that he did something wrong because I haven't gotten some of my return back. How do I go about getting my 2019 money back? I received my state tax but not my federal or stimulus yet.