Customer Service

I have received a SMS from Woolworths stating my store card increase limit has been declined, but I did not request it, so I decided to enquire more using whatapps chat service , I was ignore and no one has entertained my enquiry, not sure if my account has been tempered with at the end of the day , if something happens it will be my fault , so disappointed with Woolworths with the agents, who suppose to assist the customers but lacking customers services it disappointing , I have been taken to pilar to post when you request service from Woolworths