Customer service at Hapag Lloyd is non existent

I am very disappointed in the manner that Hapag Lloyd handled our request for a refund of a credit note issued by them. I am not sure if it is due to incompetence of the staff or company policy to stall and delay for as long as possible. I have sent numerous e-mails, first one sent on 17 March 2020, to get a refund for R6166.00 for railage incorrectly charged on a container shipped on “MSC Savannah”, Bill of Lading: HLCUHAM***. A credit note dated 27 April 2020 was issued in full and an invoice raised on 13 May 2020, resulting in a net credit of R5743.00. Since then I have sent numerous follow up e-mails requesting payment to our bank account. I am still waiting for a response to my last e-mail that I sent dated 8 June, where I informed them that I was going to hand the matter to our lawyers for recovery of the funds if they hadn’t paid by 30 June 2020. On 17 March 2020 I sent an e-mail in connection with another query on this same shipment regarding storage and demurrage amounting to R1770.03 and additional costs incurred to move the container by road from Durban to Johannesburg amounting to R1422.00. This matter is also still not been resolved It is unacceptable that 3 months have gone by and Hapag Lloyd have still not finalised either of the queries detailed above.