Can the sponsor or applicant make a complaint for the decision of visit visa to UK for 6 months ?
What is the procedure or link to do that ?
Nope, there is no standard procedure to appeal or complaint against a standard visitor visa refusal for UK.
Refusal letters clearly say:
In relation to this decision there is no right of appeal or right to administrative review.
Generally, there is no right of appeal for visit visa applications. However, that does not mean that ECO's have no accountability. You still have two options:
Depending on why you think the decision was wrong, you should also contact the British Embassy/High Commission in your country, the decision making hub, the independent inspector for the UKVI, and any other relevant bodies that you think could make a difference.
Edit: The OP has posted a copy of the refusal notice. While the refusal may appear unfair, I don't think the remedies above will help him much. The ECO is concerned about the two large deposits in the OP's account and while the ECO does not outright accuse the OP of deception, he thinks the documents submitted cannot be considered evidence. The burden of proof is on the applicant. He has to prove he qualifies.
A second application would be the way to go. To show the origin of these funds and depending on what exactly was sold the OP could produce:
You can NOT ask for a review because your application is excluded from review per the link below.
If you're outside the UK
You’ll be told in your application refusal letter if you can ask for the decision on your visa application to be reviewed. This is known as an ‘administrative review’.
You can only ask for an administrative review if all of the following apply:
- you’re outside the UK
- you applied outside the UK
- your application was refused on or after 6 April 2015
- you don’t have a right of appeal against the refusal
- you didn’t make an application as a visitor or a short term student
How to apply
You must apply for an administrative review within 28 days of getting the decision.
You’ll either get the administrative review application form with your application refusal letter, or you’ll be asked to download it.
When you get the form you must:
- enter the reasons for refusal that are on your decision letter, and say why you think a mistake was made
- send your completed form in the method the application refusal letter suggests (by email, post or in person)
The guidance notes tell you how to fill in the administrative review application form.