The ornamental design for an ostomybagsupportdevice, as shown and described.
FIG. 1 is an isometric view of an ostomy bag support device showing my new design;
FIG. 2 is an operational view of my design in use;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof showing my design.
No claim is made to the ostomy bag, the user or the belt of the user shown in broken lines, it is shown for environmental purposes only. Lines along portions of the edges of the support device are stitching; the stitching represent environmental structure which form no part of the claimed design.