person ought to help forgot about it

I took back a Kingson back pack to the store. the shop assistant told me that in order for them to exchange the back i would have to come back 4 days later to come pick up. Linda promised to call me, to let me know if they have the bag from other incredible connections. well I called Linda on Tuesday, he said he had forgotten about the incident. i asked him if he had ordered the bag, he said no. so i take it, he said everything he said to get rid of me in the store. well i gave him an option that i can take any bag of the same value from the same brand, He said no we cant allow you to do that, you have to get the same bag.