router?

i got head breaking problem with our internet connection just this month after we've invested our money to purchased 30,000php worth of equipment to feed our needs in wireless internet.
Everything was done from networking to router configuration and fortunately it was working fine for about 2 weeks. However, after the following weeks and month passes by the problem start to sprout and interrupting our internet communication.

Then, i started bumping to the mobile router, wifi router, switch and the network cable to check the cause and eradicate it. Eventually, i got some speculation either the mobile router or the ISP has caused this conflict. Perhaps, i'll try to keep in touch with the provider's tech support to replay this concern these next following days. This time, i'll just cross my fingers to have good connection this evening.