Private Driving Instructor Singapore

Scam and ripoff. Entry fee was $155 but fee to change instructor is $175. Instructor was an unamused grumpy and naggy old man who seemed to drag the lessons as much as possible to get extra pocket money and outright refuses to teach any useful techniques even after 11 lessons. Always scolded and laughed at me, that is fine as long as im learning , but on the last lesson when I said I'll call him later to confirm the next lesson booking instead of paying in advance for the next lesson, his comments became ruder and more personal. End of the day forced me to drive straight to sembawang mrt, instead of the usual yishun mrt; opposite of where I intended to go and further inconveniencing me. 11 lessons that spanned over 5 months and I have barely learned anything else other than the basic traffic rules and driving skills. Lessons are spread over 3-5 weeks and at this rate will take 2 years to get a license. Called up admin to inquire but shrugs off complains and defends the instructor for his rude behavior. Unacceptable