Swift hawk 702 not feeding

Hi got 2 swift hawk 702 blasters and both don’t feed the gels I have tried many different gels and I will get them to fire 1 out of about 10+ pulls of the bolt
Has any else come across this?

I had one yesterday and no problems feeding with any gel.
The t-piece tube is wide and directly above the mag so if the bit on the bolt is sliding back when you cock it, it should activate the feed mechanism.
Can you tell me:
Does the mag get pushed downwards much when cock it?
Does your mag feed gels if take it out and you press the button on it?
Are you pulling the bolt all the way back when you cock it?