Super Supermarket

The manager Mike is very unprofessional every time I go in there he is following me around like if Im going to steal something. Today I went in and I spent $219.00 in food shopping I purchase some hot dogs and when I get home I notice they expired on the Dec. 2, 2014 some had green things growing out of it. I go return them with my receipt and again the Manager Mike is following me, when I go to register to return he is there very rude doesn't even apologize for selling expired food. With so many people working there, they should be on top of this and if by accident it gets overlooked the correct way is to apologize for selling expired food and return me my money that I spend on hotdogs. Very unproffesional