Loan Payment Dispute

I took a personal loan back in February 2020. The agreement between the bank and I was for the bank to debit my account on the 26th of every month until my debt was paid up but in March 2020, Standard bank didn't honour the agreement as they failed to debit on the 26th of March 2020 and instead did so on the 8th of April 2020 which resulted with the debit order bouncing as I had insufficient funds available in my account. As a consequence, the bank referred my account to their lawyers (Vertex Solutions) and I was told that they will be the ones handling my debt payment. Since April 2020, both institutions have been debuting my account for the loan payment and when I inquire with Standard bank they refer me the Vertex but when I consult with Vertex I was told to return to Standard bank and TELL them to stop debuting my account. I did as told by Vertex but Standard bank referred me back to Vertex and this has been an ongoing battle for me for the past 3 months. In light of the COVID19 pandemic, money is tight and every cent counts as our economy is uncertain and I am dissapointed and disgusted in how Standard Bank has handled my case. Words cannot describe the level of frustration I have been experiencing running around between the two institutions trying to solve this.