First, you gotta tell us which holster you bought.
Paddle holsters are frequently not the best solution, because they do not solidly affix to the person.
A well-designed and properly made concealment holster will pull your pistol tightly to your body, and retain it no matter what you do...until you actively grab the gun and present it.
A well-designed and properly made holster that correctly fits your pistol should cost at least $80.00 (ready-made). A proper weight-bearing belt will cost another $80.00, and you should also buy a magazine carrier. The total cost should be 1/3 to 1/2 the cost of your pistol.