castle creations v2

Hey guys. I have been having a bit of trouble with my v2 esc. When i go to plug in the esc to the battery sometimes the motor doesnt beep and sometimes the beeps are softer than normal.Then i wiggle the motor wires that are connected to the esc and it beeps loud and normal. I am guessing if i left it like this it wouldnt give me as much top end speed because of the loose connection somewhere??(It felt slower when driving it today) Its definantely on the esc cause you push down on the wires and beeps are loud and normal. I dont really want to send the esc back as i have a race day in 3 weeks and if i send it back now im pretty sure i wouldnt have it in time. Also im pretty sure its not a cold solder because it has never done this till now. Please let me know what you guys think i should do?
thanks alot

Or is there some other way i could get a new v5 in 3 weeks?