Toys r us giving run around! Bad service

I bought a bottle warmer at the Toys r us Westville Pavilion store, the lady that assisted me told me it was suitable for what i needed. The warmer only lasted 20 days it started giving us issues it would not maintain the temperature of the bottle when we took the bottle out it will be cold. I sent my cousin to return the bottle and exchange it for a different one or even if it was the same brand or different even if I had to add in extra.... They lady who assisted her at customer service was rude a d told her she can't do that since it doesn't have a package. On Sunday I drove all the way from Zululand to sort this out, I was sooo upset I spoke to the store manager he explained that the brand is not good I should have taken snookums it better and I explained to him that if that was explained to me initially I would have returned it. Now 2days after they are telling me that before they return or exchange an item they have to consult with a merchandiser from Tote and the lady went on saying that I must call the merchant myself I'm soooo furious when I bought the item there wasn't a 3rd member I bought it from Toys r us directly and in the till slip the is no stipulation that there is a 3rd member that has to be consultated the item is faulty and has a 1year warranty and the receipt states If damaged you can return it for exchange or cash back (you will be refunded the way you paid) this issue has been dragged long enough I'm fed up from July till now I'm done. I need this resolved, I rather spend my money at Baby city the service is horrible. If a customer buys something from the store the store is responsible for whatever happens, the store should deal with the supplier on their own and must not include me!!