Try using your monthly product every 3 weeks... but consult with your vet first, and ask about using 3 or 4 different products on a rotational basis. Comb your dog alot to physically remove the ticks...
This influx of ticks is probabaly due to some evironmental factors, ie: that present the perfect enviroment for ticks and their reproduction. Hopefully something will change that will naturally cause them to disappear as quickly as they came on... you may just have to suffer through until this happens...
Link to herbal remedy:
Herbal Tick Repellent for Dogs | Healthy and Green Living#
Also: some products will take time to be effective.