Should you ever run into this issue, you can often remove the pellet stuck in the barrel on your own.
Please ALWAYS reference the owners manual on clogged pellets before proceeding!
One must use EXTREME caution when trying to remove a clogged pellet.
The most common way is to clear the breech of the bolt and magazine and using a wooden dowel rod to push the pellet back out of the gun. The dowel will not damage the barrel and will let you control the amount of force put onto the pellet. If the gun has removable baffling you may wish to remove this so they are not damaged and cause further issue when you begin to shoot again.