urgent transfer but still no money

My first time dealing with international money transfer through capitec Bank and I'm extremely disappointed.my sister from the Uk sent money through Natwest Bank but seeing that we needed it urgently she paid an extra fee so that we could have the money in 1-2days rather 7days.Upon checking my account so many times and even visting the bank still no sign of the urgent money deposited on the 11.05.15!!!So much for simple banking!