Great product up until recently

We bought into Wirulink about a year and a half ago, as we had heard that they had excellent service and a great product, the installation was done quickely and professionally and we were told we had strong signal and 100% line of site, we opted to pay for the installation spread over 12 months, and started with a 2mb uncapped line at 1:10 contention ratio and later upgraded to a 5mb, also at 1:10 contention, we were very happy with the service and the product for about a year and shortly after the installation was paid off the internet became intermittent and slow, we logged a call and the technician team was sent out to re-align the dish, as they said that they had changed technologies and the dish would need to be replaced with a new one, and this was done free of charge, we were told however that they could no longer gaurentee the speed as line of sight was being blocked by trees, they did the re-alignment anyway and internet speed was good for about a month, on Friday (01/09/2017) our internet speed dropped to unusable levels, it is intermittent and slow and wont even complete simple tasks such as download mail or load web pages, we contacted Wirulink to see if the problem was on their side, they explained that the line of sight was a problem and then i explained that i had been told that the trees were blocking line of sight, however upon further conversations we were told that maintenance was being done to the tower we should be connecting too and the dish would need to be realigned to another, tower at our cost for re-alignment, and there is no gaurentee of improvements in line of sight or speed increases. Now for my complaint, firstly i should not be charged for a re-alignment due to Wirulinks own maintenance, and should have been informed of this maintenance ahead of time. secondly i find it hard to believe that the trees blocking our line of sight to the tower just happens to co-inside with the need to move onto newer technology and change dishes, additionally i find it hard to believe that the trees were able to grow into our line of sight in just a year, the trees in question are large 100+ old Oak trees and only grow about 1.5m tall every decade. Wirulink has offered to have me cancel my service but will not re-find me for the installation costs of the equipment which i will no longer be able to use if i cancel their service. This is my Final Plea for Wirulink to sort out my wireless connection, before i move on to a different service provider, i do like the Wirulink service and support that we have received and for the most part they have been very helpful and supportive, however the call out fee every time the dish needs to be re-aligned is un-reasonable, i already pay a lot of money (much more then some of the competitors) for the service and the dish is not miss-aligning its-self , and i don't believe the explanation that birds fly into the dish and miss-align it, (the birds in my area avoid trees, dogs, cars, fences and street poles but cant see the dish please.) Please Wirulink i am a Loyal customer who has been an advocate of your product to friends and family since we got it, and has not misses a single payment, don't make me eat my own words, if you can get our internet back up to speed within the next 3 days, with no charge, i will remain a happy customer of yours, but if not you can expect my immediate cancellation, and one less advocate of your products (I sincerely hope you can get this sorted out for me.)