Poor sevice delivery, feedback, comunication

My 3 year old car, has a second broken key, the first one broke just over a year ago, and was replaced under the waranty, whilest i was waiting for that key to be replaced i used the spare key, and now the spare key broke in axaxtly the same place. when i returened the first key i was informed that there was a bad batch of keys and that they have had to replace a few allready ( Maybe i should of made them change the spare key at that time too) So please note if you buy an hyhundai budget for making keys to drive your new car it atleast every 2 years! I told them at the service about the key, they said they would look into it, They did call me to say it might not be covered by the waranty, when i asked why not, they sai they would get back to me, they didnt, only sent me a msg to tell me to come for fitment of my warranty part, so i made an appointment a week ago, arranged for some one to take my car in to have it done, they did not inform me that the part was not covered, now the car is there, and they want me to pay for the key but cant even tell me how much it is, why was this not sorted before my time was wasted? i did book the appointment a weeek ago!