You could always search Youtube for ways other people have had a workaround.

One way is to determine where the low points are by printing a set of squares or discs just one layer thick and then shim between the bed and the buildplate with adhesive backed aluminium tape that you can buy in rolls similar in size to duct tape.

From memory it's about 0.03mm thick.

Or buy a new bed which might or might not be any better.