dissapointed disgusted

I bought a pair of sunglasses in the pavilion Armani my husband tried it on and purchased it. it was on sales for 1470 firstly we were given the wrong case for secondly return policy was not discussed with us. we from pmb and my husband wore the glasses for the first time in January and realised the sunglasses keep falling down so he said i should rather exchange for a pair for myself. we purchased the pair on the 29 December 2015 I took the pair back on the 31 january 2016 the manager says I cannot exchange. she says it's thirty days policy so i say this was not explained to us I said I'm only two days late. she says it's not her problem I must drive to pavilion and sort it out I will never drive from pmb to dbn. sun glass hut is quick to make a damn sale and not explain exchange policy. I will never purchase from this store again.disgusted and very angry