Mecer Guru that does not have Microsoft Office

I got a call to upgrade my number in January 2022. And before I accepted the upgrade I asked the sales lady if the laptop has Microsoft Office, which the lady checked and confirmed.

When I received the laptop, it didn't have Microsoft Office, I went to Vodacom and was told to contact the provider since they could not help. I contacted Mondo about this and Nicolas from Mondo said I can buy my own Microsoft Office then send them the receipt they will reimburse my money. I then asked him to send me the email address where I will send the receipt.I then thought I need what he said on paper, so the following day I called again to request what Nicolas said on an email (this is after I sent them an email requesting this).

After I got through i spoke to Nicolas again and he said they are now investigating, the 2 days later was told my complaint was invalid.

I am happy with the device but what they sold to me is not what I received. What do I do?