Unable to reach Standard Bank re credit card *****

I have used over R200 in airtime to try and reach anyone on thr phone number sent to me by Standard Bank ***** division. I asked to use the Anti***** WhatsApp group but this seems to not be used because apart from the initial welcome message, there is no response. I used the callback feature on the telephone call but am still waiting for that callback. It is costing me time and money to reach you while you could just send me a simple email or WhatsApp as an update. Instead you send my text messages with phone numbers that lead nowhere. I need service.