No Stock yet they take my money

I signed up for Telkom's uncapped LTE since it is now available in my suburb. They told me they will debit my account with R599 and then in 5-7 work days they will deliver my device. Today, day 7, they tell me they have NO STOCK and that is why nothing has been delivered yet. How is this possible that in 7 working days NONE of this is communicated to me, the customer???? Totally unacceptable customer service. Call me ASAP!!! IF YOU DON'T HAVE STOCK DON'T SELL THE PRODUCT OR YOU UPGRADE ME FOR FREE TO A BETTER PRODUCT. IF YOU CANNOT PLAN YOUR STOCK LEVELS DO NOT TAKE CONSUMERS MONEY IF YOU DON'T HAVE THE PRODUCT!