As a general rule, the (public and private limited) companies are liable for their own obligations and these are not attributed to the level of the shareholder (except to the extent of share capital investment).
When you join Xolo Go, you and Xolo conclude a partnership agreement. The services are provided to the end-customer by the partnership. Considering that the partnership is not a legal person, you and Xolo are regarded to be the contractors. Xolo has prepared general terms for the service contract and this contract stipulates significant limitations related to the liability.