We have looked into this matter in detail and so far as we have

We have looked into this matter in detail and so far as we have found that there is no ground for such a claim to be lodged against us. If you examine the goods with great care with the sample, you will find they are of the exactly same quality.
【正确答案】：我方已对此事做过深入调查，至今尚未发现有任何向我方索赔的根据。将货物与样品仔细对照，你们便会发现两者质量完全相同。