Huawei after service treatment

I am so appauled by the service received from Huawei, took a phone there for a summer campaign repair promo, got an email from Technologia that I need to pay for labor when I disputed that by sending a screen shot of the promo the lady didn't even know about the promo they came back to send another email stating that they sent me the wrong quote, the correct one was now for 904 including the repairr for a liquid damaged main board I then disputed that to say that also falls in a promo for 482 I forgot the true figure which includes the repair of the screen, back cover and main board all at once no labor charged... A week later I send my sister to collect my phone and she is being told that she needs to pay an extra amount yet it was never communicated and now the issue is being moved from one person to another and I could over hear them on the phone that no one wanted to deal with case and to make matter worse after getting confirmation from the support app that the phone has been fully repaired it appears that it hadn't been completed as yet after a long drive from Oliven to Melrose arch just to be ridiculed like that... The ladies name is Boni and I am honestly not happy by what they have put me through.

Huawei needs to educate their staff when making promotions and they need to learn customer services.