complaint-money spent for product

so I purchased riot points to buy skins that I liked. (I buy Doritos and don't normally open the bag to find lays). I have been looking to complain about this in private but maybe I am dumb and can't seem to find the customer support. I found it but I only saw help buttons. anyways I purchased a morgana skin because I liked it and it was changed on me. now I play the new warwick and the skin there is modified as well. why would I pay for more riot points if what I purchased might get changed in a month? I guess my question would be why not keep the old ones and just sell the new?