Kiddies Meal Toys not as per advert

It has been several times whereby i buy Macdonalds especially for my kids based on the toy you get with the Kiddies meal as advertised but when they food is issued they do not have stock of the toy that is advertised and give an old toy which is not even relevant to the advertised one. If you ask for something else they say they do not have stock. I have 3 x toys of the same kind recived in different weeks still closed in the packaging. This is very bad service as they do not issues and cannot provide what is advertised. There was not even a notice on the board outside with the pictures of the toys you can recive to state that they are out of stock. In once case they were no toys even to offer.