Thank you, rmvalues. 
I really hope it can be resolved without going to this extent. 
I'm sorry, I realise that there is an independent thread pertaining to Digi issues, however I believe that my case is a little bit more complicated where I'm seeking for public opinions/advise on a specific situation instead of mere questions regarding rates and plans.
Yes, probably SenQ is obligated to settle this issue. But they did mention upon purchasing (together with the Digi privilege cards) that first year warranty issues are handled by Digi and that subsequent (extended period) 3 years are to be handled under SenQ.

Anyway I still think that as professional dealers/service providers, Digi should be obligated to solve their customer's issues/requests instead of making mere assumptions and excuses. Moreover this is a case of manufacturing defect. (or am I confused with the rights I have as a consumer?)