Refusal to authorise my maternity benefit

I joint Bonitas as an adult dependent under Eskom group scheme on the 1st of January 2015 & was covered immediately without any waiting period, being from Bestmed medical aid.In mid February I found out I was 11 weeks pregnant & I notified Bonitas immediately which required Dr's confirmation letter & previous medical aid membership certificate which I forwarded.Now all of a sudden they declined to authorise my maternity benefit stating it's due to a waiting period which I fail to understand why because the statements that we received from April states that my membership benefit is active & no imposed maternity benefit are highlighted & my gynae visits were/are paid for in full.attempts to communicate has not been successful as they transfer me from one dept to another until someday one of the underwritting dept consultant hanged up on me.they keep on requesting same documents which I always forward without proper interdict from them.Im in a few possession of so many reference numbers to proof multiple of attempts to seek their review on the matter without luck. I'm due to deliver on the 04th of August & I'm still not sure what's going to happen.