Terrible service by Investo

I have a investment account with Momentum , part of it gives me one withdrawal. I contacted them to get information on which documents I need to submit in order to make a withdrawal. I submitted the required documents on 5 November 2018, I followed up on 8 November an received a response on the 9th. Stating the the documents I submitted were invalid, I made the necessary changes and submitted a new set of documents on the same day , 9 November. Between the 9 November and the 14 November I have had no luck with getting the funds. I have followed up more than 3 times only to be told different things , that my documents are not valid or that its has been processed. The final straw was when I followed this morning only to be told I need to submit the documents. I called twice today and none of the call center agent can tell me when I will get the funds. Only the the payment has been processed and that I will get a confirmation letter. 4 hours letter I still have not received my money or the confirmation letter . I'm at the point where I just want to cancel with Momentum, the lack of urgency that has been given to me by them has just left feeling helpless and its not worth the stress I have had to go through over the past week.