[lubuntu] DNS settings messed up and resolvconf unistalled, help me please!

Hi all, my name is Mark, I am new on the forum but not on Ubuntu (been using it since the 12.04). Yesterday I messed up my network settings on lubuntu 16.04. Wifi had problems and I thought it was my problem, it tued out later, that the problem was a temporary problem with the central wifi, it basically showed as coected but I could not load any pages in Firefox. Trying to fix it I am afraid i screwed up my DNS and networking settings
I followed the advice of doing:

sudo apt-get remove --purge resolvconf && sudo apt-get install resolvconf

So I removed resolvconf but then of course I could not re-install it because inteet was not working

I can "ping 8.8.8.8" but I can't reach google.com as i get:

ping: unknown host google.com

This, as far as I understood means a DNS problem.
I think resolvconf is necessary for fixing my problem , I tried editing the config file adding

nameserver 8.8.8.8 nameserver 8.8.8.4

But It does not work

On my laptop fortunately I also have Windows 10 on a small partition, I used it to download the .deb file of resolvconf from http://packages.ubuntu.com/ but it gives me a MIMEtype error and does not let me install it.
I tried downloading the tar.gz but when I extract it i cant do

./config (or ./configure)

because i get:

debconf: DbDriver "passwords" waing: could not open /var/cache/debconf/passwords.dat: Permission denied Template parse error near `# These templates have been reviewed by the debian-l10n-english', in stanza #1 of ./templates

How do I reinstall resolvconf and how do I fix the " ping: unknown host google.com" inteet problem?

I tried to look on the forum and online but no luck so far

I am desperate as I am on holiday and I really need Lubuntu coected to the network, Windows 10 is damn slow and I don't like it

If anyone can help it would be great!

Thank you in advance