Incredibly frustrating seemingly unresolvable process for a trivial request....

I have been trying to close my bank account for 20 days now and this has been some of the most frustrating processes I have been through.

I emailed the request, and 1 attempted call back 9 days later, and another 2 calls 2 days after that. I was in meetings and could not answer. I called back 5 times since then. first two times I was notified that the person has left work (2 calls took a total of 20min), third call I was notified of the same thing (took 6min), fourth the the person was in but not answering and I was cut off after 19 minutes. Firth call I lost my cool and informed the person on the other end, after 20min on the line, (embarrassingly in a aggressive way) that I refuse to be told the same thing again and that I want to speak to a manger as I need to finish this off now...19min later I hung up.

This has been an appalling experience and hope that someone can just assist to close my account.