Mall car washers just painful

The one thing that is really disappointing about Cresta mall is that as soon as you stop, inside, secure parking, you are approached by people wanting to wash your car - and they are demanding, really become painfully rude sometimes when you say no. Does not matter how you say no, kind, polite, abrupt, short, either way they just keep on. You can no longer just go for a nice breakfast, or a quiet dinner, so rather just stay away. The sad thing is, it is all the malls at the moment.