Dollar General review: product/digital coupons

The manager along with employees are so unprofessional.They look as if they just rolled out of bed and went to work...I go shop there because i work in the same shopping center but everytime i go and try to use my digital app.They claim they are sold out or they cannot honor the sale because the item is not on sale at their store..this is an everyday thing..They also have a basket with seasonal items on clearance but when i get to register the cashier says the item is not on clearance so she cannot honor the clearance price, , come to find out the employees are buying all the clearance items...The reason i know is because i have a relative that used to work at that store but she transferred to another location because the manager is all about favoritism