Unfair treatment after so much support.

I bought duty shoes becouse I love them to a total of R7000, then they deducted less on my account, they called told me there was an error I made payment of R4000 that was a shortage on my payment same day, a day later I send my daughter to buy a dress which was duty when she get home it's too small cos it's hard to close the zip,when she takes it back they say it's dirty