Momentum Medical Aid's terrible service & negligence to switch debit order

Today (8th of May 2020) i received an email from a Momentum employee informing me that my membership will be terminated in 2 days due to non-payment of my membership fees - as i am in arrears for both March and April.

On the 23rd of March 2020 i completed detailed forms to update my banking details from ABSA to FNB.

This has not been done from a Momentum administration perspective, as i am now not only being threatened to have my membership terminated but also ABSA have charged me due to the debit order which has bounced against my ABSA account.

I spoken to a representative in the past to have the issue rectified but to no prevail.

FNB have also attempted to intervene and have also contacted Momentum to have the debit order switch done but they were declined from Momentum's side.

I demand to be refunded the bank charges for which i have now been charged due to negligence on Momentum's side, as well as change my banking details as i have requested before on email and telephonic ally.

My outstanding account for March 2020 was paid manually on the 20th March 2020, this also has not been captured by Momentum administration side and i am still according to Momentum in arrears for March.