Nearly doubled price on forehead thermometer!!

On 4th may I checked prices for the forehead thermometers. I came across Dischem‘a and the price was R525.00. The following day we went to different branches, Farrarmere/ Springs / Retail park/ Brakpan and my son even went as far as Greenstone’s but all had the same excuse... sorry sold out we will let you know when we have stock. Needless to say we had to constantly phone the branches and same lame excuses, no stock as yet. Last week we went to your Springs branch only to find that now the price is R999.00!!! What a *******!! This needs to be investigated .