the contract which was concluded in the presence of the two witnesses and the bride, (Part No. 18; Page No. 172) without the presence of her Waliy (a legally accountable person acting for a woman regarding marriage), is not valid.
This is because the presence of a Waliy is a condition for a valid marriage contract. You can renew the contract in the presence of her Waliy and two witnesses.
it is not permissible for you to be alone with your fiancée or to kiss or touch her because before concluding a valid marriage contract, she is considered a non-Mahram (not a spouse or an unmarriageable relative). May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.