Non existing customer service online

I have made use of the online ordering system. This system is setup very professionally and works as expected. I have ordered some items, made payment, which included delivery costs (rather expensive). The system indicated that my order was successful and that payment has been received. Delivery date was indicated to be 2 days after placement of the order. This is now 2 days after indicated delivery date and still my items were not delivered yet. The "contact us" option was used to make contact with the business, which are very generic with no direct numbers or e-mail addresses to specific stores. I have received no feedback from this method of contact and even the phone number that I called is not being answered. I have opted to do business with this large chain/franchise and hoped to receive acceptable service, however, the customer service for online business is still non existing and therefore I am disappointed and wary to continue doing business with them online. it seems that the system grew too big too fast and online customer service pays the price!