problem with license theme of themeforest


I had license theme of themeforest (medial Directory). I had installed on my website since almost 3 years.

Almost 3 weeks ago my site was not opening, so I contacted the service provider who replied that the theme is having error so changes the theme.

Accordingly, I have changed the theme to vantage and made changes.

Now both themes are visible. In some tabs as well as home page medical directory theme is visible an on some tabs as well as posts vantage theme is visible.

I did not get any reponse from themeforest since almost a fortnight.

Kindly guide me so that Vantage theme should be visible throughout my site.