Still waiting for goods Purchased

Its been nearly 3 weeks since my order on the MultiplyOnlineStore and as advertised the vouchers were meant to arrive 3 working days after purchasing the relevant vouchers. I emailed, phoned and was even contacted by a Manager at Momentum Multiply to hear my issue. Still, all they can say its being looked into. Now when I try to follow-up I simply get no response. This is not how you treat a loyal customer who has been paying his membership on time for 4 years. If this is not resolved soon. I perhaps need to start looking at alternative insurance and investment firms. Please assist and resolve this issue ASAP!