I Would Like My Money Back

I have a NetShort subscription that was started through the Google Play Store, but I do not use this service and I want it cancelled and my money refunded. I am 68 years old and I do not know much about using a tablet, so I do not know how to manage or cancel subscriptions from Google Play. Despite this, NetShort continues to charge me for a service I do not watch. These payments have been taken for about a month. I request that my NetShort subscription be cancelled as soon as possible and that the amounts charged in this period be refunded to me, as I am not using the service and I do not know how to cancel it myself.