If it's your first time playing the game, I'd suggest not using the boosters anyway, there's really no need for them.
Ordered mine on the 13th July, had an email saying they'd accepted my game and would charge me £9.97 but they'd tried to take the funds but couldn't, phoned them up, said not to worry, it's still processing and they'd get in touch with me later in the week if it hadn't cleared. Still hasn't left my bank, they've got my Battlefield 4, spent majority of today on the phone, well attempting to get through, nothing, emailed them Tuesday, had nothing back. Not the most positive of experiences.