Camping **** chairs

I bought 2 maxed camping chairs paid R400 each this was bought at the canal walk store, to my surprise this chairs both broke at the same place after being used less then a hour, I then bought 2 new ones at chrckers which is still working for half the price. So what **** is Mr price selling to people? What must I do with brand new broken chairs? Assistance is required to return either for a refund or even a swop as this is totally unacceptable