Q: My iPhone 6s over heated during use and turned off.  I handed it in at Vodacom where the contract is and they want me to pay R 4588 to replace the handset still under guarantee.

Hi 0824512777,
 

Thanks for visiting the Apple Support Communities.
 

I understand you've been advised that your iPhone 6 needs to be serviced.
 

There isn't a problem with iPhone 6 overheating, and you can find more information on the topic at Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures.
 

For more help with warranty service, you may want to visit the following link. You can choose your country from the drop-down menu at the top-left of the page. https://support.apple.com/kb/index?page=servicefaq&geo=united_states&product=iph one

Best Regards.