Leon's Furniture review: return and exchange policy

Hi,
few days ago l have been in north York Leon's store location. l brought dining table set, sofa, rug and bed with frame. l measured sofa in my condo but sales person told me if l brought L in the shape it will be better. Anyway l thought his idea nice and sofa will look in my condo better. He was polite and feel me welcome to store. this reason l feel about sofa he is right. However after one week Leon's delivery our sofa. l signed l got it. When l tried to put the sofa l saw got a lot place.that mean doesn't fit probably in saloon. Then l was driving Leon's store and told them about sofa doesn't fit in saloon. They told me l must spoke with customer care service .l explained him about sofa doesn't fit my condo and l am not happy to keep it and l wanted to change it...he told me if l return the sofa it reduce %50 off mean half price of sofa l must pay it by cash or credit card. When they will get the sofa they will give me credit for shopping.he argued with me and l didn't accept %50 my money done .l told him l accepted with some cost me but not that %50..he become angry and told me l will leave store and l never come back again. l told him l come here for deal and you don't own Leon's to tell him l never back again. After that anyway l don't want trouble l left the Leon's store.
1.when l buy furniture where is my right? Even when l signed after one day how comes they don't accept the furniture?
2.who protect me right? and my money comes right away %50 off?
3.l want to solve my problem who organization or government can help me?
4.he really can tell me l leave the store and l never go back in Leon's again?