求翻译：因为一个赞助是同学介绍的，就没有签订合同。在活动中出现了问题，但由于无合同可依。最后，为商家干了活，但是商家却没有履行合同承诺，付清金额。是什么意思？

Because a sponsor is to introduce students, there is no signed contract. At the event there is a problem, but without a contract according to Finally, the business did live, but the business has failed to fulfill contractual commitments, paid the amount.

Because it is a sponsored students, without a signed contract on. In the event there is a problem, but since no contract. Finally, in order to dry the wood business, but business is failing to meet contractual commitments, the payment amount.

Because a support is schoolmate introduces, has not signed the contract.Had the problem in the activity, but because does not have the contract to be possible to depend on.Finally, worked for the business, but the business has not fulfilled the contractual commitment actually, pays in full the amoun

Because a sponsor is to introduce, there is no signed contract. There have been problems in the activity, but no contract. Finally, for businesses to do the work, but businesses have no contract commitment, paying off the amount.

正在翻译，请等待...