Bad service

Standard bank locked my account without informing me and when I reach out to them they told me to send the documents that they requested then on the 3 September Monday I send all the documents even now they never responded to me yesterday I call them and ask what is the problem because I don't even have a case number but they just locked my account and this month I didn't get my child grant it stuck in there I don't know what to do now because I've tried everything to reach out to them but the respond I get is that the department of ***** will call me even now I haven't received that call what a bad service at all I need to use that money for groceries.......it almost 2 weeks trying to get my card back I very disappointed in you guys your service it very bad