Try searching online for some reputable, professional appliance repair services in your location to get it fixed.
Hopefully there may be two or three to choose from. If so, check online for any reviews about their service etc and see what they show, then contact all of them and ask about their charges and if they offer a guarantee on their workmanship etc. Most reputable repairers give at least 30 days. If they don't then find someone else who does.
Armed with this information go with whoever you feel most comfortable dealing with.
Sorry to be so vague but as ifixit is a worldwide forum, you may not get an answer here at all. Also recommendations can be too subjective so are not usually permitted on ifixit as it may be construed as advertising.
Hopefully all that has happened to your blender is that a surge suppressor and a fuse may have blown on the control board and can be easily repaired by a professional.
If you feel like trying to repair it yourself, disassemble the blender and take some pictures of the control board and post them back here in your question. Hopefully it can be seen what has happened and some advice given as to what to do to fix it. Here's how to do this on ifixit Agregar imágenes a una pregunta existente