bad service

I made a booking for the 17th April online. BOOKING ***3 <br> I found no option to get seniors discount. online booking<br> I paid the R3000 deposit and tried to phone and email to get the discount<br> It is now 2 weeks later, 5 emails and numerous phone calls which is not answered (the phone just rings)<br> As a pensioner its costs me money to phone from my cell phone to a landline....<br> I have no option to complain about the bad service I am getting from this cruise line