Poor communication by Vox Telecom

On 23 April 2025, I wrote to Vox regarding the invoice I received whihx has an increase on the usual amount I pay, which was due to the VAT increase (which was in dispute). On 25.April 2025I received a response that the 'Ticket ' was closed and they awaiting the developments on tje matter.in dispute . I must keep them updated on any developments. On 28 April I followed up on the matter via email regarding the reversal of the proposed VAT increase . The reason was ascertain the status of my account since I am due to pay.by 1 May. I followed up with numerous phone calls which I would hang up for.30 minutes with no success of going through.