Businessman preventing two people from transacting a sale on his property

Q: Could mufti advise on the following: 

Person A owns a Cash n Carry, person B and person C both are his customer's and purchase from him. At the premises of person A, person B and C meet and start transacting on person A's premises. Person A in turns tells Person B that person C is my customer and you cannot supply him. 

1. Is this type of clause permissable in shariah where person A stops person B from supplying person C as he feels it's his customer. 

2. If person B and C transacted on person A's property, is the sale valid.

Overcoming one's fears

Q: Wherever I work, I am always afraid of the people and have fear for people. 

When I am given some work, I start thinking a lot about how to do it and what to do. 

The fear of the boss and some other people is sitting in my heart and mind. I don't have much mental peace and I make silly mistakes, small mistakes happen easily which become big. 

I also have fear of taking leave, fear of work not being completed, fear of asking something, I have all these fears. 

My dream is to get a job in the government or a company like that nearby. I have applied at many places but I am failing and I am not getting a call from big companies and dream that our home loan gets quickly finished. 

I request for a wazifa, Amal or Taaweez if any to benefit myself and also that my home loan gets finished up soon.

Taking out mandatory travel or health insurance

Q: My husband and I were planning on taking a trip to Istanbul, Turkey. We considered it as it is a Muslim dominant location and we wouldn’t have to worry about halal food and would get to visit mosques and for how beautiful it is. However there are two issues:

1. Turkey has a mandate of a travel insurance or health insurance in order to travel to Turkey without which they do not approve of the visa. What should be done in this case? 

2. Back when covid was rampant and vaccination was being made compulsory, I have made a fake certificate. This was done because the vaccine was beeen given mandatorily without it being tested sufficiently. Many people did the same to avoid harm that could be caused due to the vaccine. Now mostly all countries do not require the vaccine certificate but they do sometimes ask for it. What should I do? I cannot get an actual vaccine because the system thinks I have had it already. Plus, post vaccination a lot of people have suffered and some say it is attributed to the vaccine and I don’t want to get vaccinated. Should I just show the fake certificate I have?