Contract upgrade

My phone was due for upgrade and I app**** at MTN Atterbury shop for Megatalk L which was a Black Friday promotion. The application was on 28 November 2022 if not mistaken. I have been taken from pillar to post and at one point I phoned credit/finance department as requested by the store manager. The credit/finance department alleged that they adjusted my credit limit and I should go to the store to finalise my application.

Now, that has not been done according to the manager of the shop and he also sent email to get this sorted but has not received any replies to the email. I'm not sure what to do but now but my matter has to be resolved. the only issue is the adjustment of credit limit that should be done by someone who is willing to assist from credit/finance department. Affordability is not an issue, only issue is the willingness of that particular employee to adjust and that' s it. Can I please get assistance on that as I'm not a person of complaining but now I have run out of patience with MTN. My contract number is ***