Hi Suneeti,
It is unfortunate you have chosen to leave a bad review even though this is through no fault of our own and you did in fact tell our staff you had a great time when you got back from your safari.
While we understand the Viator portal is sometimes confusing, this is a 3rd party site and we cannot control all aspects of the listing. However, it is clearly stated in the 'additional info' in the product page on Viator that participants must be 12-15yo to drive with an adult or 16yo and above to have their own ski. Had you been unsure about this, you could have emailed, called or texted as you made your booking a month in advance. We were also texting you in the days leading up to your booking, so there was no shortage of time to ask.
As we discussed on the day, we did attempt to resell the ski for you, which had we been able to, we would have been able to refund the 4th ski, however given the short notice, we were unable to resell it.
We do hope you have some enjoyable experiences in future.
Kind Regards.