Still Waiting for credit card increase

App**** for an increase on my credit card, submitted relevant documents on the 9th of March, phoned the next day to see if all was received. They said it takes 24-48 hours to process. Phoned again this morning, spoke to a lady by the name of shannah Williams. She said she couldn't find the mail, she asked me to send it once more and cc her then she will confirm receipt of the documents and process it. She did not confirm, still waiting. This is really how not to be doing business, still waiting almost a week later. Can someone assist as this is urgent. It seems nobody checks the limit increase inbox