Miss understanding effect on weapon gems

Hi admin,
Recently I brought a weapon gems from shop with the discription "Crits have 30% to gain 1sp" but after few battles I noticed the true effect is "being hit with crits regen 1sp" now I feel that I wasted my 900gems to buy a useless gem , please fix the items discription and is it possible for me to get the refund for the gem because of the misunderstanding for the gem effect that I have feel no use of it...
Thanks
IGN : Hinegami
Recently I brought a weapon gems from shop with the discription "Crits have 30% to gain 1sp" but after few battles I noticed the true effect is "being hit with crits regen 1sp" now I feel that I wasted my 900gems to buy a useless gem , please fix the items discription and is it possible for me to get the refund for the gem because of the misunderstanding for the gem effect that I have feel no use of it...
Thanks
IGN : Hinegami