I'm so angry and furious

I'm so so disappointed in capitec bank masingita mall..I went there today morning asking them to help me change my surname as I'm married now...I gave them my old I'd and my marriage certificate unfortunately I'm not working any can't be able to go to home affairs and do a I'd or temporal I'd ..I'm coming from labour they told me that my surname has changed...I need to go to capitec bank and update my surname they told me that they can't help me with my marriage certificate cos I DNT HV my new id with my new surname....I'm very disappointed in capitec I banked with them from 2010 till now...how am I supposed to get money to do my I'd cos I'm waiting for labour money...capitec is capitec bank because of customers but if they doing what they please with us surelyyyy I need to go to another bank.....the manager was explaining nonsense to me.... horrible horrible I feel like screaming ?