Discovery taking for ever to fix a wrong claim

I have been struggling with Discovery for 2 weeks now to reverse a claim that was paid from my savings instead of from my PMB benifits. The reasons they are giving me is not making sense at all. My PMB got registered from the 1st of April until the end of December 2021. According to the consultant my benifit was only loaded from the 1st until the 15th of April but a claim on the 5th of May went off PMB but the 11th's claim went off my savings. I needed mu savings funds for something else and they just don't care to resolve this.