Kika Hair Extensions

Ok first of all I purchased a "full set of mink or silk eyelash extensions" on Groupon for $I get to this place for my scheduled appointment and the only girl who is working tells me , no the Groupon package isn't a full set it's only 30% of a full set so I have to pay an additional $to get the full setWhich I doAs well as a $tipWell my lashes were NOT MINK OR SILK when she finishedThey were a thick plastic lash which were itchy and heavyI was extremely mad about the advertising for a full set when in fact it was only 30% of a setHow does Full set equal to 30% of a set in these people's minds? Groupon refunded me the Groupon amount because they also stated the Groupon I purchased was indeed for a full set not 30% of a set, but not my additional $Also how can this business advertise mink or silk and use plastic? And how can they advertise a price amount for a full set but it's only 30% of a full set once you get there and make you pay more? There