Horrible service from Medihelp

I have savings credit due to me by medihelp. The funds were supposed to be paid out on the 1st of may. I called medihelp on the 2nd of may to follow up and I will receive an sms that confirms that the funds will be paid out in 5 business working days. on the 9th of may I called again advising that the funds were not paid out as they do not have my banking details. The lady sent me the forms to fill in and requested my supporting documents. I filled the form and sent it right away with the banking details.

on the 11th I received an email from medihelp asking if I want to change my form of payment to debit order which I rep**** to No. on the 15th my banking details were changed. I called to follow up when I will receive my funds, the lady on the phone advised that i will get an sms MAYBE on the 20th, if not i have to wait till the end of the month.

My problem with medihelp: When I joined in 2017, I submitted my banking details, what happened to them? because I have not changed them? There is a credit due to me, no one from medihelp bothered to call me and advised that they lost my banking details. I had to keep phoning and making follow ups with them. Now that I have submitted my banking details, i get a further date? WHY?

I need my funds and I cannot wait till end of the month. Can this be dealt with urgently.