Non Immigrant Type B from consulate Frankfurt

I am in an absurd situation as I applied for a non immigrant type B at Thai General Consulate in Frankfurt. Precondition to get it, is amongst other things a valid work permit OR alternatively a WP.3 - approval from Ministry of Labour (MOL) that you are qualified and allowed to take up a job in Thailand.

I am working since more than 15 years in Thailand with an own company and submitted all required documents like work permit, company register showing that I am the owner, company license, insurance cover....everything need to get a visa.

Besides having a valid work permit the consulate requested to get a WP.3, which you only can get when you  have NO work permit or you need to cancel a valid work permit to get it. Further they ask to get an invitation letter from my company.

Although difficult to obtain, I submitted some additional papers from MOL together with an invitation letter from my company to myself that I am invited to visit my company.

Now they wanted to get a confirmation from my company stating that I am still employed with them. Complying with that request I issued this confirmation that I, as the owner am still employed with my company.

All this process took weeks with very tenacious communication - I had much better experience with them last November - and now I am running out of time.

I feel that although staff is very helpful and fully aware that I submitted all required documents that the guy who is signing the visa is making arbitrary decisions and always coming up with a new requirement.

My problem: I am flying on coming Wednesday and do not even start with COE process, I have to do my PCR test tomorrow and in case I do not get my visa in time have to cancel my ASQ accommodation. 

My queries to you folks: does anybody has similar experience especially with the Consulate in Frankfurt? And, I know this is rhetorical but Is there any right to claim the visa when you comply to all preconditions and submit all required documents?

Very much appreciate your comments. Thanks.