Bad services

Ive started applying for medical aid from November 2017 with Dicovery Key care. It took them up untill January to finalise my application. As a results ive incurred 3 month's waiting period because of that.

They now recently generated an offer letter that is still have incorrect information. Im trying to get them to rectify the errors they created on their side with no Luck. Im afraid that this is going to dragg for another 30 days and I will endup having to re apply again as they clearly state that if a customer does sign an offer letter within 30 days the application will be withdrawn and the client will have to re_apply gain Please I need some intervention.Ive treated very unfair by Discovery.