With the current issues of not recongnsing distance education engineering courses. It would be better for you to decide to do a regular BTec/BE- CSE coourse so that you don't waster your time and hard earned money.
The options for me are
1. you can check among the colleges in Dharwad only or in Belgaum or Hubli that are close to you.
Since you have done your Diploma in CSE for 3 years,You can check with the college whether they will allow you take exemptions for your previous Diploma in CSE.
If yes, then very good you can start your Bachelor of Engineering in Comptuer Science and Engineering or your B.TEch
2.Many engineering colleges seats are running vacant for lack of students, try and find out from the colleges if you can do the course part time or get at least an exemption for 1-2 years or try getting a job in the same college campus which should be worth a try.
3.If not you can choose an evening college for your further studies in BE-CSE and B.TEch adn then join a partime job in either teaching or as a service engineer in the same city.
Once you choose the combination - Day time college and Evening working or Evening working with day time college then you can plan your next move. It would be ideal if your find this in Dharwad, if not be prepared to move to a different city
Again here you can choose Mangalore or Bangalore in addition to the above three places ( Dharwad, Hubli,Belguam).
1.SDM College of Engineering and Technology
Khalgatgi Road, Dhavalagiri, Dharwad, Karnataka 580002
Phone:0836 244 7465. firstname.lastname@example.org
2. Visvesvaraya Technological University, Belagavi is an ahour and half from Dharwad.
3. KLE Society's B. V. Bhoomaraddi College of Engineering & Technology
Vidyanagar, Hubli 580 031. Karnataka - India.
Tel. : +91 - 836 - 2374150, 2378123
Fax : +91 - 836 - 2374985
E-mail : email@example.com
4. M V J College of Engineering (Evening College), Bangalore
Near White Field, Channasandra,Kadugodi (P), Bangalore.
5. Dayananda Sagar College of Engineering (Evening College), Bangalore
Shavige Malleshwara Hills,Kumarswamy Layout, Bangalore
Before you embark, try and have a chat with your teachers or friends as see if this would be a good move B.Tech or BE in CSE with your previous degree and work experience.