I accidentally bought a $50 SIM from Woolworths (I wanted to go on 365 80GB plan and should have bought the $2 SIM). Anyway, Woolworths won't refund my SIM. The $50 SIM is for a 28 day plan. Does this start from when I register on site or has it already started? When purchased, it went through an "activation" at check out. Do I have any other options? Thanks in advance!