Endless problems wil under garenty

Good day lady's and gentlemen thy service is good but lately actually since i both my Swift 150 s****** if had none stope problems going back and forth frome them every time its somthing new thats gone wrong if literally bine in the last 4 weeks if bine buy them 4 times whit the same issue over and over again and every time i get hite and have to forke out R720-R1700 fore the same issue if given up plz advise me on what to do the s****** iz 8 month old and stil under warranty