Overcharging on Collection Fee

Only ordered 2 specific items which was <R500.00 & per the website, the Collection Fee is R30.00. On proceeding to the check out, there was the option of R50.0 to collect today, Monday & R30.00 to collect Thursday & I selected R30.00. However, it would not change the R's under Collection in the total invoice, so I communicated with TakeALot & received a sms that a shopping assistant would contact me & then another sms that the order would be cancelled if payment is not received within 24 hours. As yet no communication & if nothing within 24 hours then I will accept that this is standard practice from TakeALot who believe that all customers will just pay in order to get the items.