No call as promise

I am so discussed with Discovery never in my life have I come across such incompetence. Manger promise to call back regarding code query on outstanding payment, still waiting. Since when is it the consumer responsibility to know medical terms / codes / payments etc. SERVICE IS REDICULOUS after being on hold more than 2times on one for about 1half hours, what type of service is this, cause that isn't. For such big company having to give such terrible service just a BIG NO GO\ I await speedy reply and confirmation that outstanding bill on codes being fix and paid. Have enough savings why should I go through manual payment and claim back...bull shut!!!!!"