Try to add some of these nodes:
addnode=216.250.125.121
addnode=69.164.198.161
addnode=45.79.10.59
addnode=104.237.137.28
addnode=66.228.56.115
addnode=104.200.17.141
addnode=45.79.135.140
addnode=45.33.7.79

Should work. Did the same yesterday with my wallet.