wifi on elementary not working

Hi I am new to this site and to Linux as well.

I installed the newest elementary on my Toshiba Satellite laptop. Since then sometimes there is some available WiFi sometimes not, but I cannot connect to a thing in either case.

ifconfig:
enp0s20u3c4i2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.10.3 netmask 255.255.255.240 broadcast 172.20.10.15
inet6 fe80::38f9:96b0:5bfc:21b prefixlen 64 scopeid 0x20<link>
ether 8a:e9:fe:9a:7d:b0 txqueuelen 1000 (Ethernet)
RX packets 1249 bytes 347264 (347.2 KB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 1407 bytes 404664 (404.6 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

enp8s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether c4:54:44:b8:b2:12 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 165880 bytes 98530207 (98.5 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 165880 bytes 98530207 (98.5 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

wlp7s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 30:3a:64:ad:db:a3 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

iwconfig:
lo no wireless extensions.

wlp7s0 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on

enp0s20u3c4i2 no wireless extensions.

enp8s0 no wireless extensions.

What can I do?

Thanks