bad service.no responsibility

On the 28th october my twins were born.lancet sent me a bill on the 7th of december to pay R4149.98.as the claim was rejected by the medical aid.i called discovery and the claim was rejected because of the wrong dependent code on yhe claim which was 00. I called lancet and the first consultant confirmed that it will be changed n the name of the twin will appear on the claim and i must call after 7 days to confirm that it was sent to me and discovery.i called after 9 days. The second consultant tells me its impossible to amend the account as its over due by163 days and she can't dip anything.i call again and the third consultant says its not clearv what must be amended.i repeat my story again.he escalates the matter to a supervisor who doesn't come back to me.i call again and the fourth consultant tells me she will put me through to a team lead. She confirms that she will call me the following morning(23/02) but nothing.i call again.im put through to another team lead amelia who cant help me and tells me o must wait till friday.she then says a manager boitumelo will call me back but cant confirm when.what i want is simple.amend details on V*** to dependent code 01 mpati mojapelo