Thanks for your query.
The birth control has obviously failed to control the heavy periods
You could be requiring a higher dose, or a different preparation of hormones altogether.
Also, a gynecological evaluation should be done to rule out the cause of menorrhagia
( heavy menstrual bleeding ).
If no obvious cause like fibroids, cysts, etc is found, then hormones should work in regulating your periods.
Please consult your doctor to prescribe a different brand , and one with a higher hormonal
If a pelvic ultrasound
has not been done, then please get it done.