Family Dollar — Expired product bought, not resolved

I bought Family Wellness Allergy tablets and Mucinex tablets from the Sumpter Rd., Belleville MI store and both products are expired dated 22022. I opened the Mucinex, desperate to take…..and I did take 2doses, then read the pkg. The Allergy tablets were bought for my 88yo mother and thank *** she caught the date. I took the items to the store and spoke with the Mgr and because none was on the shelf he disputed that the items came from that store 1 mile from my home. Not the 1st time expired products sold here. How can we resolve? GloriaThompson 734-262-1401. glothomp@hotmail.com