R500 mpesa voucher not loaded

A month ago I activated a mpesa account at the waterfront Vodacom store, then three weeks ago I went to edgars Tygervalley and bought R500 worth of vouchers and tried to load them. they me an error so I called the Vodacom mpesa call centre so they can load them for me they told me there was something wrong with my account that is why the voucher are not loading. they fixed the account the following day and promised me that the vouchers will be loaded within 24 hours, that was three weeks ago. Ayanda couldn't assist me further so she handed me over to her Supervisor(Buyi) who also promised the \24 hrs policy"even now I'm still waiting for the vouchers to be loaded. """