Terrible customer service

I registered a complaint on the Ocean Basket website on Sunday 29th March about the terrible service we received. Its a week later and they haven't acknowledged this complain. it would seem that they have made no attempt to contact me. No email, phone call, sms, smoke signal. Nothing. Being in retail myself I know how important it is to delight every customer. I don't want a free meal from Ocean Basket, in fact I'll never eat there again, I just want them to look at their level of customer service.